There is a red truck behind the horses.
Some animals are near an object.
A truck cannot be referred as an object.
exists p1 x1 x3.(n_horse(x3) & exists s1 x2.((x1 = x2) & behind(x2,x3) & n_truck(x2) & a_red(s1) & Theme(s1,x2)))
exists p1 x1.(exists x2.(near(x1,x2) & n_object(x2)) & n_animal(x1))