A man standing in front of a wheelchair throwing something.
A man is throwing something.
The man throwing something could be standing in front of anything.
exists e1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(x1,x3) & of(x3,x4) & Theme(e1,x6) & Actor(e1,x5) & v_throw(e1) & n_thing(x6) & (x4 = x5) & n_wheelchair(x4) & n_front(x3) & n_standing(x1) & of(x1,x2) & n_man(x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_throw(e1) & n_thing(x2) & n_man(x1))