Four boys are sitting in a muddy stream.
the dogs eat fish
Boys are not dogs.
exists e1 s1 x1 x2.(in(e1,x2) & n_stream(x2) & a_muddy(s1) & Theme(s1,x2) & Actor(e1,x1) & v_sit(e1) & n_boy(x1) & card_eq_4(x1))
exists e1 x1 x2.(n_dog(x1) & Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_fish(x2))