Three people sing into a microphone.
the three people are singing together
Not all people singing into a microphone are singing together.
exists e1 x1 x2.(into(e1,x2) & n_microphone(x2) & Actor(e1,x1) & v_sing(e1) & n_people(x1) & card_eq_3(x1))
exists e1 p1 x1.(n_people(x1) & card_eq_3(x1) & exists s1.(Theme(s1,x1) & a_together(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_sing(e1))