Costello: And you don’t know the fellows’ names?
Abbott: Well I should.
Costello: Well then who’s on first?
Abbott: Yes.
Costello: I mean the fellow’s name.
Abbott: Who.
Costello: The guy on first.
Abbott: Who.
Costello: The first baseman.
Abbott: Who.
Costello: The guy playing…
Abbott: Who is on first! – Abbott and Costello