An Indian man climbing a tree.
A man is sitting on the back of a truck.
The man is either climbing a tree or he is sitting in a truck, not both.
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_climb(e1) & n_tree(x3) & (x1 = x2) & n_man(x1) & a_indian(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(n_back(x2) & on(e1,x2) & of(x2,x3) & n_truck(x3) & Actor(e1,x1) & v_sit(e1) & n_man(x1))