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.
( z0 have :ARG0 ( z1 person ) :ARG1 ( z2 furniture :ARG2-of ( z3 sit :ARG1 z1 ) ) )
(z0 / have-03
    :ARG0 (z1 / person)
    :ARG1 (z2 / furniture
              :ARG2-of (z3 / sit-01
                           :ARG1 z1)))
The person has furniture to sit on .
z0 :ARG0 z1
z0 :ARG1 z2
z2 :ARG2-of z3
z3 :ARG1 z1