Complex sentence: The Women's Strike for Equality was a strike which occurred on August 26,1970, celebrating the fiftieth anniversary of the passing of the Nineteenth Amendment, which effectively gave women the right to vote.
Split into simpler sentences: The Women's Strike for Equality was a strike which took place on August 26,1970. It celebrated the fiftieth anniversary of the passing of the Nineteenth Amendment, which effectively gave women the right to vote.