guy playing two instruments at one time.
The man is only playing one instrument.
One instrument is not two instruments.
exists e1 x1 x2 x3 x4.(a_topic(x1) & at(e1,x4) & n_time(x4) & card_eq_1(x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_instrument(x3) & card_eq_2(x3) & (x1 = x2) & n_guy(x1))
exists e1 s1 x1 x2.(n_man(x1) & a_only(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_instrument(x2) & card_eq_1(x2))