The itch<br>I was sitting on the floor. My dog had played in this room. I rolled over to get more comfortable. I landed on a pile of dog hair. The dog hair made my skin itch.
The person has furniture to sit on.
Reason:  Furniture is never mentioned, but they may have some and choose to sit on the floor.  Why: Only the floor is mentioned as a place to sit.
( z1 have :ARG0 ( z2 person ) :ARG1 ( z3 furniture :ARG2-of ( z4 sit :ARG1 z2 ) ) )