Simplify the following text for a Grade 7 native English-speaking person.
Original: Paramount Pictures had been an early backer of television , launching experimental stations in 1939 in Los Angeles and Chicago . The Los Angeles station eventually became KTLA , the first commercial station on the West Coast .
Simplified: It created stations in 1939 in Los Angeles ( later to become KTLA ) and Chicago 's WBKB .