An elderly man selling vegetables from the back of his vehicle.
A man is standing near a vehicle.
The man is selling from the back of his vehicle so he must be near it.
exists e1 s1 x1 x2 x3 x4 x5.(n_vehicle(x5) & of(x5,x4) & n_male(x4) & n_back(x4) & a_topic(x1) & from(e1,x4) & of(x4,x5) & Theme(e1,x3) & Actor(e1,x2) & v_sell(e1) & n_vegetable(x3) & (x1 = x2) & n_man(x1) & a_elderly(s1) & Theme(s1,x1))
exists e1 x1 x2.(near(e1,x2) & n_vehicle(x2) & Actor(e1,x1) & v_stand(e1) & n_man(x1))