A man floating in a green canoe.
A man is enjoying canoeing.
A man floating in a green canoe is not necessarily enjoying canoeing.
exists e1 s1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_canoe(x3) & a_green(s1) & Theme(s1,x3) & Actor(e1,x2) & v_float(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1) & n_canoeing(x2) & n_man(x1))