A man is kayaking in the ocean.
A man is running on the beach.
cant be kayaking and running at the same time
exists e1 x1 x2.(n_ocean(x2) & in(e1,x2) & Actor(e1,x1) & v_kayake(e1) & n_man(x1))
exists e1 x1 x2.(n_beach(x2) & on(e1,x2) & Actor(e1,x1) & v_run(e1) & n_man(x1))