Grouping data in google sheets?

Question

I want to know how I could group the information from google sheets such that I can form groups with 3 team members. I want to be able to copy information of a registrants details (if the number of team members is under 3) and then paste it into the column above such that it can form a team of 3. The sorted list should look something like this.

unsorted array sample

sorted array sample

I've tried using some google sheets functions such as VLOOKUP, what java/python APIs would you recommend to solve this problem.

"entry": [{
            "id": {
                "$t": "https://spreadsheets.google.com/feeds/list/1sjPsuoIZOJWRLLcJlvZbvKuHnGn6KfaqLLa3rpSXmR0/od6/public/values/cokwr"
            },
            "updated": {
                "$t": "2020-07-28T09:58:17.850Z"
            },
            "category": [{
                "scheme": "http://schemas.google.com/spreadsheets/2006",
                "term": "http://schemas.google.com/spreadsheets/2006#list"
            }],
            "title": {
                "type": "text",
                "$t": "Dan"
            },
            "content": {
                "type": "text",
                "$t": "registrantlastname: M, registrantsemailadress: dan@gmail.com, secondmemebersfullname: MatL, secondmembersemail: mal@gmail.com, thirdmembersfullname: Oscar, thirdmembersemailaddress: radio@hotmail.com, teammembers: 3"
            },
            "link": [{
                "rel": "self",
                "type": "application/atom+xml",
                "href": "https://spreadsheets.google.com/feeds/list/1sjPsuoIZOJWRLLcJlvZbvKuHnGn6KfaqLLa3rpSXmR0/od6/public/values/cokwr"
            }],
            "gsx$registrantfirstname": {
                "$t": "Dan"
            },
            "gsx$registrantlastname": {
                "$t": "M"
            },
            "gsx$registrantsemailadress": {
                "$t": "dan@gmail.com"
            },
            "gsx$secondmemebersfullname": {
                "$t": "MatL"
            },
            "gsx$secondmembersemail": {
                "$t": "mal@gmail.com"
            },
            "gsx$thirdmembersfullname": {
                "$t": "Oscar"
            },
            "gsx$thirdmembersemailaddress": {
                "$t": "radio@hotmail.com"
            },
            "gsx$teammembers": {
                "$t": "3"
            }
        }, {
            "id": {
                "$t": "https://spreadsheets.google.com/feeds/list/1sjPsuoIZOJWRLLcJlvZbvKuHnGn6KfaqLLa3rpSXmR0/od6/public/values/cpzh4"
            },
            "updated": {
                "$t": "2020-07-28T09:58:17.850Z"
            },
            "category": [{
                "scheme": "http://schemas.google.com/spreadsheets/2006",
                "term": "http://schemas.google.com/spreadsheets/2006#list"
            }],
            "title": {
                "type": "text",
                "$t": "Mariana"
            },
            "content": {
                "type": "text",
                "$t": "registrantlastname: Fake, registrantsemailadress: mari.fake@itesm.ru, secondmemebersfullname: Johnathan, secondmembersemail: jan@gmail.com, teammembers: 2"
            },
            "link": [{
                "rel": "self",
                "type": "application/atom+xml",
                "href": "https://spreadsheets.google.com/feeds/list/1sjPsuoIZOJWRLLcJlvZbvKuHnGn6KfaqLLa3rpSXmR0/od6/public/values/cpzh4"
            }],
            "gsx$registrantfirstname": {
                "$t": "Mariana"
            },
            "gsx$registrantlastname": {
                "$t": "Fake"
            },
            "gsx$registrantsemailadress": {
                "$t": "mari.fake@itesm.ru"
            },
            "gsx$secondmemebersfullname": {
                "$t": "Johnathan"
            },
            "gsx$secondmembersemail": {
                "$t": "jan@gmail.com"
            },
            "gsx$thirdmembersfullname": {
                "$t": ""
            },
            "gsx$thirdmembersemailaddress": {
                "$t": ""
            },
            "gsx$teammembers": {
                "$t": "2"
            }
        }, {
            "id": {
                "$t": "https://spreadsheets.google.com/feeds/list/1sjPsuoIZOJWRLLcJlvZbvKuHnGn6KfaqLLa3rpSXmR0/od6/public/values/cre1l"
            },
            "updated": {
                "$t": "2020-07-28T09:58:17.850Z"
            },
            "category": [{
                "scheme": "http://schemas.google.com/spreadsheets/2006",
                "term": "http://schemas.google.com/spreadsheets/2006#list"
            }],
            "title": {
                "type": "text",
                "$t": "Lorem"
            },
            "content": {
                "type": "text",
                "$t": "registrantlastname: Ipsum, registrantsemailadress: lorem@gmail.com, teammembers: 1"
            },
            "link": [{
                "rel": "self",
                "type": "application/atom+xml",
                "href": "https://spreadsheets.google.com/feeds/list/1sjPsuoIZOJWRLLcJlvZbvKuHnGn6KfaqLLa3rpSXmR0/od6/public/values/cre1l"
            }],
            "gsx$registrantfirstname": {
                "$t": "Lorem"
            },
            "gsx$registrantlastname": {
                "$t": "Ipsum"
            },
            "gsx$registrantsemailadress": {
                "$t": "lorem@gmail.com"
            },
            "gsx$secondmemebersfullname": {
                "$t": ""
            },
            "gsx$secondmembersemail": {
                "$t": ""
            },
            "gsx$thirdmembersfullname": {
                "$t": ""
            },
            "gsx$thirdmembersemailaddress": {
                "$t": ""
            },
            "gsx$teammembers": {
                "$t": "1"
            }
        }, {
            "id": {
                "$t": "https://spreadsheets.google.com/feeds/list/1sjPsuoIZOJWRLLcJlvZbvKuHnGn6KfaqLLa3rpSXmR0/od6/public/values/chk2m"
            },
            "updated": {
                "$t": "2020-07-28T09:58:17.850Z"
            },
            "category": [{
                "scheme": "http://schemas.google.com/spreadsheets/2006",
                "term": "http://schemas.google.com/spreadsheets/2006#list"
            }],
            "title": {
                "type": "text",
                "$t": "Ki"
            },
            "content": {
                "type": "text",
                "$t": "registrantlastname: C, registrantsemailadress: abc@live.com, teammembers: 1"
            },
            "link": [{
                "rel": "self",
                "type": "application/atom+xml",
                "href": "https://spreadsheets.google.com/feeds/list/1sjPsuoIZOJWRLLcJlvZbvKuHnGn6KfaqLLa3rpSXmR0/od6/public/values/chk2m"
            }],
            "gsx$registrantfirstname": {
                "$t": "Ki"
            },
            "gsx$registrantlastname": {
                "$t": "C"
            },
            "gsx$registrantsemailadress": {
                "$t": "abc@live.com"
            },
            "gsx$secondmemebersfullname": {
                "$t": ""
            },
            "gsx$secondmembersemail": {
                "$t": ""
            },
            "gsx$thirdmembersfullname": {
                "$t": ""
            },
            "gsx$thirdmembersemailaddress": {
                "$t": ""
            },
            "gsx$teammembers": {
                "$t": "1"
            }
        }, {
            "id": {
                "$t": "https://spreadsheets.google.com/feeds/list/1sjPsuoIZOJWRLLcJlvZbvKuHnGn6KfaqLLa3rpSXmR0/od6/public/values/ciyn3"
            },
            "updated": {
                "$t": "2020-07-28T09:58:17.850Z"
            },
            "category": [{
                "scheme": "http://schemas.google.com/spreadsheets/2006",
                "term": "http://schemas.google.com/spreadsheets/2006#list"
            }],
            "title": {
                "type": "text",
                "$t": "jane"
            },
            "content": {
                "type": "text",
                "$t": "registrantlastname: Ong, registrantsemailadress: j.ong@live.com, secondmemebersfullname: john Ong, secondmembersemail: j.ong@live.com, teammembers: 2"
            },
            "link": [{
                "rel": "self",
                "type": "application/atom+xml",
                "href": "https://spreadsheets.google.com/feeds/list/1sjPsuoIZOJWRLLcJlvZbvKuHnGn6KfaqLLa3rpSXmR0/od6/public/values/ciyn3"
            }],
            "gsx$registrantfirstname": {
                "$t": "jane"
            },
            "gsx$registrantlastname": {
                "$t": "Ong"
            },
            "gsx$registrantsemailadress": {
                "$t": "j.ong@live.com"
            },
            "gsx$secondmemebersfullname": {
                "$t": "john Ong"
            },
            "gsx$secondmembersemail": {
                "$t": "j.ong@live.com"
            },
            "gsx$thirdmembersfullname": {
                "$t": ""
            },
            "gsx$thirdmembersemailaddress": {
                "$t": ""
            },
            "gsx$teammembers": {
                "$t": "2"
            }
        }]
    }

Answer 1

This problem should be for a large dataset like this.

From here onwards, you can collect all who are in groups of 2 by selecting the filter icon in top right corner view and split them into groups of 1 using VLOOKUP and drag it down to repeat itself.

Finally, combine the 1s together and use HLOOKUP functions to get the correct names and indexes. For the team members just enter values (3,1,1). This will give you the array you want.