Summary table with a field that shows components of each summarized record

[المشرف العام]

I have a table with 2 fields the first is for community and the second for the main community that it belongs to, as in the image

I want to summarize the second field (Belongs_to) but with an extra field (multiple value field) that shows components of each main community, as in the image

Could anyone help me please?



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