A young boy chasing a gull on the beach
A child building a sand castle on the beach
A boy cannot be chasing a gull and building a sand castle at the same time.
exists e1 s1 x1 x2 x3 x4.(n_beach(x4) & a_topic(x1) & on(e1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_chase(e1) & n_gull(x3) & (x1 = x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2 x3 x4 x5.(n_beach(x5) & a_topic(x1) & on(e1,x5) & Theme(e1,x3) & Actor(e1,x2) & v_build(e1) & n_castle(x3) & of(x3,x4) & n_sand(x4) & (x1 = x2) & n_child(x1))