A man is playing guitar by the ocean.
the man is swimming in the ocean
One cannot simultaneously be playing the guitar and swimming.
exists e1 x1 x2 x3.(n_ocean(x3) & by(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & n_man(x1))
exists e1 x1 x2.(n_ocean(x2) & n_man(x1) & in(e1,x2) & Actor(e1,x1) & v_swim(e1))