A man loading gear onto a horse's back.
A man is loading gear.
the man is loading gear even if it is not on a horses back.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & onto(e1,x5) & n_back(x5) & of(x5,x4) & n_horse(x4) & Theme(e1,x3) & Actor(e1,x2) & v_load(e1) & n_gear(x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_load(e1) & n_gear(x2) & n_man(x1))