A dog swims in the ocean with a surfboard.
A dog is running.
A dog is either swimming or running.
exists x1 x2 x3 x4.(n_ocean(x3) & a_topic(x1) & in(x1,x3) & with(x3,x4) & n_surfboard(x4) & n_swim(x1) & of(x1,x2) & n_dog(x2))
exists e1 x1.(Actor(e1,x1) & v_run(e1) & n_dog(x1))