A boy opening a present.
the boy is ten years old
Just because he is a boy does not necessarily mean he is ten years old. He could be any age.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_open(e1) & n_present(x3) & (x1 = x2) & n_boy(x1))
exists e1 x1 x2.(n_boy(x1) & Theme(e1,x2) & Pivot(e1,x1) & r_more(e1) & v_old(e1) & n_year(x2) & card_eq_10(x2))