Complex sentence: George Gimarc (born 1958) is a Texas disc jockey, record and radio program producer and author who is known for his extensive and authoritative knowledge about the classic rock radio format, recorded music in general, and specifically the era of punk rock.
Split into simpler sentences: George Gimarc (born 1958) is an American disc jockey, record and radio program producer and author based in Texas. He is known for his extensive and authoritative knowledge about the classic rock radio format, recorded music in general, and specifically the era of punk rock.