A man bathes in a waterfall as another man looks on.
A fish swims in the ocean.
A waterfall is not the same type of water entity as an ocean.
exists e1 e2 x1 x2 x3 x4 x5.(on(e2,x5) & n_thing(x5) & Actor(e2,x1) & v_look(e2) & in(e1,x4) & n_waterfall(x4) & as(e1,x3) & n_man(x3) & -(x3 = x1) & n_man(x1) & n_man(x1) & Actor(e1,x2) & v_bathe(e1) & (x1 = x2))
exists x1 x2 x3.(n_ocean(x3) & a_topic(x1) & in(x1,x3) & n_swim(x1) & of(x1,x2) & n_fish(x2))