A man rows a blue kayak through white water rapids.
The man is surfing in the ocean.
The man can either row a blue kayak through white water rapids or be surfing in the ocean. He can't be in two places at once.
all x1 s1.((n_kayak(x1) & a_blue(s1) & Theme(s1,x1)) -> exists s2 x2 x3 x4 x5.(a_topic(x2) & through(x2,x4) & n_rapid(x4) & of(x4,x5) & n_water(x5) & a_white(s2) & Theme(s2,x4) & for(x2,x1) & n_row(x2) & of(x2,x3) & n_man(x3)))
exists e1 x1 x2.(n_ocean(x2) & n_man(x1) & in(e1,x2) & Actor(e1,x1) & v_surf(e1))