A man is playing a guitar on stage.
A man plays the trombone in his mother's basement
It's either a guitar or trombone, on stage or in his mother's basement.
exists e1 x1 x2 x3.(on(e1,x3) & n_stage(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & n_man(x1))
exists e1 x1 x2 x3 x4.(n_basement(x4) & of(x4,x3) & n_mother(x3) & of(x3,x2) & n_male(x2) & n_trombone(x2) & in(e1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_man(x1))