Woman holds up a sign while smiling big.
The girl just heard a joke.
Just because a girl is smiling it doesn't mean she heard a joke
exists e2 e1 p1 s1 x1 x2.(ne_nam_woman(x1) & while(e1,e2) & exists s2.(Theme(s2,x1) & a_big(s2)) & Topic(e2,p1) & Actor(e2,x1) & v_smile(e2) & a_up(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_sign(x2))
exists e1 s1 x1 x2.(n_girl(x1) & a_just(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_hear(e1) & n_joke(x2))