A man and a boy are sitting at an altar both are holding bells.
There are two people, a man and a boy.
Unless told of other people, we can only know that there are the two people mentioned.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6.(Theme(e2,x6) & Actor(e2,x1) & v_hold(e2) & n_bell(x6) & subset_of(x3,x1) & a_both(s1) & Manner(e1,s1) & at(e1,x5) & n_altar(x5) & Actor(e1,x4) & v_sit(e1) & (x3 = x4) & n_boy(x3) & subset_of(x2,x1) & n_man(x2))
exists p1 x1 x2 x3 x4 x5 x6.((x1 = x2) & subset_of(x4,x2) & subset_of(x6,x4) & n_boy(x6) & subset_of(x5,x4) & n_man(x5) & subset_of(x3,x2) & n_people(x3) & card_eq_2(x3))