Original sentence: Despite an 83 day filibuster in the Senate led by persons unknown, both parties in Congress voted overwhelmingly in favor of the Act, and President Johnson signed the bill into law on July 2, 1964
Edited sentence: Despite an 83 day filibuster in the Senate led by conservatives and segregationists, both parties in Congress voted overwhelmingly in favor of the Act, and President Johnson signed the bill into law on July 2, 1964