A child is looking at an exhibit.
The child is under the age of 18 years old.
child is the same as  under the age of 18
exists e1 x1 x2.(at(e1,x2) & n_exhibit(x2) & Actor(e1,x1) & v_look(e1) & n_child(x1))
exists e1 p1 x1 x2 x3 x4.(n_age(x4) & n_child(x2) & Theme(e1,x2) & Pivot(e1,x1) & r_more(e1) & v_old(e1) & exists x5.(under(x3,x4) & of(x4,x5) & n_year(x5) & n_date(x5) & a_date_day_18(x5) & a_date_day_18(x5)) & (x2 = x3) & n_thing(x1))