Complex sentence: California's 42nd congressional district is a congressional district in the U.S. state of California that from 2003 to 2013 covered parts of Los Angeles, Orange, and San Bernardino counties in Southern California.
Split into simpler sentences: California's 42nd congressional district is a congressional district in the U.S. state of California. From 2003 to 2013, the district covered parts of Los Angeles, Orange, and San Bernardino counties in Southern California.