A blond girl plays the cello in a plywood-paneled room.
The girl is playing the piano.
A cello and a piano are two different musical instruments.
exists e1 s1 s2 x1 x2 x3.(n_cello(x2) & in(e1,x3) & n_room(x3) & a_plywood-paneled(s2) & Theme(s2,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_girl(x1) & a_blond(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_piano(x2) & n_girl(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1))