Complex sentence: In the 21st century, Cancún had largely avoided the bloodshed associated with the trade of illegal drugs, but is known for its retail drug sales to tourists as well as for being a center of money laundering.
Split into simpler sentences: In the 21st century, Cancún had largely avoided the bloodshed associated with the trade of illegal drugs. But it is known for its retail drug sales to tourists as well as for being a center of money laundering.