Complex sentence: Grape Street Watts Crips, Bounty Hunter Watts Bloods, and PJ Watts Crips--formed a cease-fire agreement after the 1992 Los Angeles riots, a pact that may have contributed to the decrease in crime in the area between 1992 and 2000.
Split into simpler sentences: Grape Street Watts Crips, Bounty Hunter Watts Bloods, and PJ Watts Crips--formed a cease-fire agreement after the 1992 Los Angeles riots. Their pact that may have contributed to the decrease in crime in the area between 1992 and 2000.