Complex sentence: Silver Lake was also home to Harry Hay, credited with founding the first gay organization, the Mattachine Society, which began as Bachelors Anonymous, lived and had meetings here at the time the group began in 1950.
Split into simpler sentences: Silver Lake was also home to Harry Hay, credited with founding the first gay organization, the Mattachine Society, which began as Bachelors Anonymous. Hay lived and had meetings in Silver Lake at the time the group began in 1950.