A man in a black shirt and cap playing piano.
A man is playing the piano.
Just because a man is in a shirt and cap doesn't necessarily mean he is playing the piano
exists s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(x1,x2) & n_piano(x4) & of(x4,x6) & n_playing(x6) & of(x4,x5) & n_cap(x5) & n_shirt(x3) & a_black(s1) & Theme(s1,x3) & subset_of(x4,x2) & subset_of(x3,x2) & n_man(x1))
exists e1 x1 x2.(n_piano(x2) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_man(x1))