Guy playing the guitar and smiling.
A guy is playing the trombone.
The guy is either playing the guitar or the trombone, but not both
exists e1 x1 x2 x3 x4.(n_smiling(x4) & n_guitar(x3) & subset_of(x4,x2) & subset_of(x3,x2) & ne_nam_guy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1))
exists e1 x1 x2.(n_trombone(x2) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guy(x1))