Complex sentence: A constitutional convention met in Monterey in September 1849, and set up a state government that operated for 10 months before California was admitted to the Union as the 31st State by Congress as part of the Compromise of 1850, enacted on September 9,1850.
Split into simpler sentences: A constitutional convention met in Monterey in September 1849, and set up a state government. It operated for 10 months before California was admitted to the Union as the 31st State by Congress, as part of the Compromise of 1850, enacted on September 9,1850.