请教各位高手：I-485表中Part 3的C项(即List your present and past membership in
or affiliation with every political organization, association, fund,
foundation, party, club, society, or similar group in the United States or in
other places since your 16th
birthday)是指填政治或军事性组织吗？学术研究团体(academic and professional
membership) 是否不填？谢谢！