A dog leaps in the air while chasing a tennis ball.
the dog is very happy
The dog which plays with a tennis ball doesn't mean it is very happy
exists e2 e1 x1 x2 x3 x4.(n_air(x2) & while(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_chase(e2) & n_ball(x3) & of(x3,x4) & n_tennis(x4) & in(e1,x2) & Actor(e1,x1) & v_leap(e1) & n_dog(x1))
exists s1 x1.(n_dog(x1) & r_very(s1) & Theme(s1,x1) & a_happy(s1))