A man playing a musical instrument.
a man playing football
Playing a musical instrument contradicts with playing football.
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_instrument(x3) & a_musical(s1) & Theme(s1,x3) & (x1 = x2) & n_man(x1))
exists x1 x2 x3.(a_topic(x1) & n_football(x1) & of(x1,x3) & n_playing(x3) & of(x1,x2) & n_man(x2))