An animal running through the sand at the beach.
An animal chasing seagulls at the beach
Not all animals are chasing seagulls.
exists e1 x1 x2 x3 x4.(n_beach(x4) & n_sand(x3) & a_topic(x1) & at(e1,x4) & through(e1,x3) & Actor(e1,x2) & v_run(e1) & (x1 = x2) & n_animal(x1))
exists x1 x2 x3 x4.(n_beach(x4) & a_topic(x1) & at(x1,x4) & n_seagull(x1) & of(x1,x3) & n_chasing(x3) & of(x1,x2) & n_animal(x2))