A gray dog runs along the green grass.
A dog runs after a tennis ball.
A gray dog running along the green grass does not necessarily runs after a tennis ball.
exists e1 s1 s2 x1 x2.(n_grass(x2) & a_green(s2) & Theme(s2,x2) & along(e1,x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1) & a_gray(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(after(e1,x2) & n_ball(x2) & of(x2,x3) & n_tennis(x3) & Actor(e1,x1) & v_run(e1) & n_dog(x1))