A man sitting in a canoe on the shore of a lake.
A man scuba dives.
The man can't be sitting in a canoe and scuba diving at the same time.
exists e1 x1 x2 x3 x4 x5.(n_shore(x4) & a_topic(x1) & in(e1,x3) & on(x3,x4) & of(x4,x5) & n_lake(x5) & n_canoe(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1))
exists x1 x2 x3.(a_topic(x1) & n_dive(x1) & of(x1,x3) & n_scuba(x3) & of(x1,x2) & n_man(x2))