Detailed Instructions: Given a text, write a compressed version of it in a single sentence.
Problem:Mariachi groups have been very popular in southern California since the 1930s, and currently hundreds of groups have been formed in the Los Angeles area. Even students at the University of California at Los Angeles formed a group in 1970 called Mariachi Uclatlan.
Solution:
Mariachi has been popular in Californi since 1930s and many have been formed in Los Angeles. Students at Univerity of California formed the Mariachi Uclatlan group