Complex sentence: Boatwright chaired the new Committee on Offenses against the Administration of Justice and his committee's subpoenaing NAACP membership lists and other investigative activities soon reduced the organization's membership in Virginia by half.
Split into simpler sentences: Boatwright chaired the new Committee on Offenses against the Administration of Justice. His committee's subpoenaing NAACP membership lists and other investigative activities soon reduced the organization's membership in Virginia by half.