Complex sentence: Systers is the largest email community of technical women in computing in the world and predates the Anita Borg Institute, having been founded in 1987 by Anita Borg.
Split into simpler sentences: Systers is the largest email community of technical women in computing in the world. It predates the Anita Borg Institute, having been founded in 1987 by Anita Borg.