A dog catching a ball
The dog is laying on the grass.
The dog cannot be catching a ball and laying on the grass simultaneously.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_catch(e1) & n_ball(x3) & (x1 = x2) & n_dog(x1))
exists e1 x1 x2.(n_grass(x2) & n_dog(x1) & on(e1,x2) & Actor(e1,x1) & v_lay(e1))