A man playing guitar sings into a microphone.
The man is playing a violin.
A man cannot play the guitar at the same time he is playing a violin.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & into(e1,x5) & n_microphone(x5) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_sing(x3) & of(x3,x4) & n_guitar(x4) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_violin(x2))