Complex sentence: Richardson is on the board of directors of the National Institute for Civil Discourse (NICD), which was created after a shooting which left 6 dead and 13 wounded, including Congresswoman Gabrielle Giffords.
Split into simpler sentences: Richardson is on the board of directors of the National Institute for Civil Discourse (NICD). Which was created after a shooting which left 6 dead and 13 wounded, including Congresswoman Gabrielle Giffords.