sentence1: Held every December, this is one of the largest and richest rodeo events in the country, featuring 10 days of the nation's top cowboys and cowgirls riding bulls, busting broncos, and roping calves at the Thomas and Mack Ceter.
sentence2: One of the largest and most popular rodeo events in the country is held in December at the Thomas and Mack Ceter and features 10 whole days of the nation's top cowboys and cowgirls riding bulls, broncos, and roping calves.