a boy walks.
A 10 year old boy walks.
The boy may not be a 10 year old.
exists e1 x1.(Actor(e1,x1) & v_walk(e1) & n_boy(x1))
exists e1 s1 x1 x2.(Actor(e1,x1) & v_walk(e1) & n_boy(x1) & a_old(s1) & Theme(s1,x1) & of(x1,x2) & n_year(x2) & n_date(x1) & a_date_day_10(x1) & a_date_day_10(x1))