Birds flocking by the water's edge.
A whale breaches the surface.
A whale is not birds.
exists e1 x1 x2 x3 x4.(n_edge(x4) & of(x4,x3) & n_water(x3) & a_topic(x1) & by(e1,x4) & Actor(e1,x2) & v_flock(e1) & (x1 = x2) & n_bird(x1))
exists e1 x1 x2.(n_surface(x2) & Theme(e1,x2) & Actor(e1,x1) & v_breach(e1) & n_whale(x1))