A lady laughs at a man's gestures.
The lady is sad
if the lady is laughing she is not sad
exists e1 x1 x2 x3.(at(e1,x3) & n_gesture(x3) & of(x3,x2) & n_man(x2) & Actor(e1,x1) & v_laugh(e1) & n_lady(x1))
exists s1 x1.(n_lady(x1) & Theme(s1,x1) & a_sad(s1))