Complex sentence: Among them are Iraqi Americans for Peaceful Alternatives, created prior to the 2003 invasion, and The Peace Cafe, which seeks to promote Arab-Jewish dialogue, and at 800 members is the largest such group in the Washington, DC area.
Split into simpler sentences: Among them are Iraqi Americans for Peaceful Alternatives, created prior to the 2003 invasion, and The Peace Cafe, which seeks to promote Arab-Jewish dialogue. At 800 members it is the largest such group in the Washington, DC area.