A boy in a dark shirt is reading a book while sitting on a piano bench.
The boy is sitting on the couch.
bench is contradictory to couch
exists e2 e1 s1 x1 x2 x3 x4 x5.(while(e1,e2) & on(e2,x4) & n_bench(x4) & of(x4,x5) & n_piano(x5) & Actor(e2,x1) & v_sit(e2) & Theme(e1,x3) & Actor(e1,x1) & v_read(e1) & n_book(x3) & in(x1,x2) & n_shirt(x2) & a_dark(s1) & Theme(s1,x2) & n_boy(x1))
exists e1 x1 x2.(n_couch(x2) & n_boy(x1) & on(e1,x2) & Actor(e1,x1) & v_sit(e1))