A man plays guitar and sings into a microphone.
A man is playing his guitar at a concert.
Just because the man is singing and playing a guitar it doesn't mean he's doing it at a concert
exists e1 x1 x2 x3 x4 x5.(into(e1,x5) & n_microphone(x5) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & subset_of(x4,x2) & n_sing(x4) & subset_of(x3,x2) & n_guitar(x3) & n_man(x1))
exists e1 x1 x2 x3.(at(e1,x3) & n_concert(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & of(x2,x1) & n_male(x1) & n_man(x1))