the dog barks at the toy.
The dogs are near a toy.
dog barks at the toy so there should be  dogs near a toy.
exists x1 x2 x3.(n_toy(x3) & n_bark(x1) & of(x1,x2) & n_dog(x2) & a_topic(x1) & at(x1,x3))
exists p1 x1.(n_dog(x1) & exists x2.(near(x1,x2) & n_toy(x2)))