A dog swims in a pool near a person.
A cat walking on a fence
dog is not a cat, and cant be walking and swimming at same time
exists e1 x1 x2 x3.(in(e1,x2) & near(x2,x3) & n_person(x3) & n_pool(x2) & Actor(e1,x1) & v_swim(e1) & n_dog(x1))
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_fence(x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_cat(x1))