请问N-400表格 part 12
9 A. Have you ever been a member of, involved in, or in any way associated with, any organization, association, fund, foundation, party, club, society, or similar group in the US or in any other location in the world?
因为申请绿卡的时候说了曾是党员，同时附了一份说明，因为长时间未缴党费，所以相当于退党了。所以这个表格上为了一致，肯定也必须如实填写了。
问题是后面有个关于 group purpose的问题，这该怎么回答呢？
多谢