a young girl stands on one leg.
A young teen girl stands on one of her legs
A teen girl is a young girl. A girl has two legs. She stands on one. That means she stands on one out of two legs.
exists e1 s1 x1 x2.(on(e1,x2) & n_leg(x2) & card_eq_1(x2) & Actor(e1,x1) & v_stand(e1) & n_girl(x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 s2 x1 x2 x3.(on(e1,x2) & of(x2,x3) & n_leg(x3) & of(x3,x1) & n_female(x1) & n_thing(x2) & card_eq_1(x2) & Actor(e1,x1) & v_stand(e1) & n_girl(x1) & a_teen(s2) & Theme(s2,x1) & a_young(s1) & Theme(s1,x1))