It's a branch of philosophy
RELATED to linguistics.
The Big Bang Theory Season 1, Episode 5
Oh, hey, on a RELATED subject...
The Big Bang Theory Season 3, Episode 6
Oh. Yeah, I wonder if that's
RELATED to the 12th-century
The Big Bang Theory Season 10, Episode 7
All right.
Is my pole flag RELATED?
The Big Bang Theory Season 9, Episode 15
are you RELATED to Dr. Beverly Hofstadter?
The Big Bang Theory Season 9, Episode 12