Birds flocking by the water's edge.
Birds are landing near the water.
Birds flocking near the water's edge implies the birds are landing to drink or swim.
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_water(x2) & near(e1,x2) & Actor(e1,x1) & v_land(e1) & n_bird(x1))