White bird walking across wet sand.
A birds looking for crabs.
A bird can walk across wet sand without looking for crabs.
exists s1 x1 x2 x3 x4.(a_topic(x1) & across(x1,x4) & n_sand(x4) & a_wet(s1) & Theme(s1,x4) & n_walking(x1) & of(x1,x3) & n_bird(x3) & (x1 = x2) & ne_org_white(x2))
exists e1 x1 x2.(for(e1,x2) & n_crab(x2) & Actor(e1,x1) & v_look(e1) & n_bird(x1))