ID1name1-name2-name3-name4....-nameX ID2name1-name2-name3-name4....-nameX ID3name1-name2-name3-name4....-nameX ... ##

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ID1nick-john-helena
ID2george-andreas-lisa-anna-matthew-andreas-lisa
ID3olivia-niels-peter-lars-niels-lars-olivia-olivia
...

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ID1nick-john-helena
ID2george-andreas-lisa-anna-matthew
ID3olivia-niels-peter-lars