The two friends are laughing and having a good time.
One of the people just told a funny joke.
Just because two friends are laughing does not imply that they told a funny joke.
exists e1 e2 s1 s2 x1 x2 x3.(n_friend(x1) & card_eq_2(x1) & Theme(e2,x3) & Actor(e2,x1) & v_have(e2) & n_time(x3) & a_good(s2) & Theme(s2,x3) & Theme(e1,x2) & Actor(e1,x1) & v_laugh(e1) & n_time(x2) & a_good(s1) & Theme(s1,x2))
exists e1 s1 s2 x1 x2 x3.(n_people(x2) & a_just(s2) & Manner(e1,s2) & Theme(e1,x3) & Actor(e1,x1) & v_tell(e1) & n_joke(x3) & a_funny(s1) & Theme(s1,x3) & of(x1,x2) & n_thing(x1) & card_eq_1(x1))