Three men are sitting at a conference table laughing.
The men sitting at the conference table laugh at a joke.
Not all three men sitting at the conference table laugh at a joke.
exists e1 x1 x2 x3 x4.(at(e1,x2) & n_laughing(x2) & of(x2,x4) & n_table(x4) & of(x2,x3) & n_conference(x3) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & card_eq_3(x1))
exists e1 x1 x2 x3 x4 x5 x6.(n_laugh(x3) & of(x3,x5) & n_table(x5) & of(x3,x4) & n_conference(x4) & n_man(x1) & a_topic(x1) & at(e1,x6) & n_joke(x6) & at(e1,x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2))