A man throws a red tomato.
A man is throwing a tomato at a singer.
Not all tomatoes are thrown at a singer
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_throw(e1) & n_tomato(x2) & a_red(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2 x3.(at(e1,x3) & n_singer(x3) & Theme(e1,x2) & Actor(e1,x1) & v_throw(e1) & n_tomato(x2) & n_man(x1))