A birthday party is going on with lots of people celebrating.
People are eating cake.
Not all people eat cake at birthday parties.
exists e2 e1 s1 x1 x2 x3 x4 x5.(with(e1,x3) & of(x3,x4) & Actor(e2,x5) & v_celebrate(e2) & (x4 = x5) & n_people(x4) & n_lot(x3) & a_on(s1) & Manner(e1,s1) & Actor(e1,x1) & v_go(e1) & n_party(x1) & of(x1,x2) & n_birthday(x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_cake(x2) & n_people(x1))