Black retriever stands in the grass, holding a bird in its mouth.
The bird is flying away.
The bird can't be flying away if it is being held by the black retriever.
exists e1 e2 x1 x2 x3 x4 x5.(n_mouth(x5) & of(x5,x3) & n_thing(x3) & n_grass(x3) & for(e1,e2) & in(e2,x5) & Theme(e2,x4) & Actor(e2,x1) & v_hold(e2) & n_bird(x4) & in(e1,x3) & Actor(e1,x1) & v_stand(e1) & n_retriever(x1) & (x1 = x2) & ne_nam_black(x2))
exists e1 s1 x1.(n_bird(x1) & a_away(s1) & Manner(e1,s1) & Actor(e1,x1) & v_fly(e1))