and uh they had a huge room which was probably uh forty feet wide and a hundred and forty feet long uh and the central portion of that room was occupied by one huge O gauge layout running uh uh Lionel train and American Flyer trains
The O gauge layout was the only thing in the room. 
mnli hypothesis: The O gauge layout was the only thing in the room.  premise: and uh they had a huge room which was probably uh forty feet wide and a hundred and forty feet long uh and the central portion of that room was occupied by one huge O gauge layout running uh uh Lionel train and American Flyer trains