Simplify the following text for a Grade 9 native English-speaking person.
Original: Nesmith is notable as a songwriter , including `` Different Drum '' sung by Linda Ronstadt with the Stone Poneys , as well as executive producer of the cult film Repo Man .
Simplified: In the 1960s , he moved to Los Angeles to start a recording career , he wrote the song `` Different Drum '' which was a hit for Linda Ronstadt and the Stone Poneys .