A guy is singing into a microphone.
A man is singing happy birthday.
Not every song is happy birthday
exists e1 x1 x2.(into(e1,x2) & n_microphone(x2) & Actor(e1,x1) & v_sing(e1) & n_guy(x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_sing(e1) & n_birthday(x2) & a_happy(s1) & Theme(s1,x2) & n_man(x1))