Question:  Jesse Frederick James Conaway is best known for writing and performing the theme to an American sitcom that was a spin-off of what series? 
Sentence (from "Jesse Frederick"): Jesse Frederick James Conaway (born 1948), known professionally as Jesse Frederick, is an American film and television composer and singer best known for writing and performing the themes to TGIF television shows such as "Perfect Strangers", "Full House", "Family Matters", and "Step By Step" for ABC.
Relevant evidence: Yes