A man is singing into a microphone.
A man singing a song.
A man singing into a microphone means he is singing a song.
exists e1 x1 x2.(into(e1,x2) & n_microphone(x2) & Actor(e1,x1) & v_sing(e1) & n_man(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_sing(e1) & n_song(x3) & (x1 = x2) & n_man(x1))