A gray bird stands majestically on a beach while waves roll in.
A bird waits for low tide to go hunting.
There is no evidence that it is high tide or low tide on the beach just because waves roll in. Just because the bird stand on the beach it doesn't mean it is waiting for low tide to go hunting. The tide level probably does not affect birds' hunting ability.
exists e1 p1 s1 s2 x1 x2.(exists e2 s3 x3.(a_in(s3) & Manner(e2,s3) & Actor(e2,x3) & v_roll(e2) & n_wave(x3)) & while(e1,p1) & on(e1,x2) & n_beach(x2) & a_majestically(s2) & Manner(e1,s2) & Actor(e1,x1) & v_stand(e1) & n_bird(x1) & a_gray(s1) & Theme(s1,x1))
exists e1 p1 s1 x1 x2.(for(e1,x2) & Topic(x2,p1) & exists e2 x3.(Theme(e2,x3) & Actor(e2,x2) & v_go(e2) & n_hunting(x3)) & n_tide(x2) & a_low(s1) & Theme(s1,x2) & Actor(e1,x1) & v_wait(e1) & n_bird(x1))