A boy is running towards a seagull on a beach.
A boy is chasing a bird at the beach.
If one is running towards something, they are chasing it.
exists e1 x1 x2 x3.(on(e1,x3) & n_beach(x3) & towards(e1,x2) & n_seagull(x2) & Actor(e1,x1) & v_run(e1) & n_boy(x1))
exists e1 x1 x2 x3.(n_beach(x3) & at(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_bird(x2) & n_boy(x1))