Three dogs walking in the grass.
The owner is walking his dogs.
Not all dogs have an owner. They could be strays that just happen to be walking in the grass.
exists e1 x1 x2 x3.(n_grass(x3) & a_topic(x1) & in(e1,x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_dog(x1) & card_eq_3(x1))
exists e1 x1 x2.(n_dog(x2) & of(x2,x1) & n_male(x1) & n_owner(x1) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1))