Complex sentence: One took place at St. Joseph's Episcopal Church in Detroit on August 11,1969, FBI files, 284 while the other took place at Cleveland during the SDS National Conference held August 29 through September 1,1969.
Split into simpler sentences: One took place at St. Joseph's Episcopal Church in Detroit on August 11,1969, FBI files, 284. While the other took place at Cleveland during the SDS National Conference held August 29 through September 1,1969.