Boys dragging a monkey on the African plains.
A boy has an animal.
If boys are dragging a monkey, it follows that at least one boy has an animal.
exists e1 s1 x1 x2 x3 x4.(n_plain(x4) & a_african(s1) & Theme(s1,x4) & a_topic(x1) & on(e1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_drag(e1) & n_monkey(x3) & (x1 = x2) & n_boy(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_animal(x2) & n_boy(x1))