A young girl exercises on a treadmill.
A younger female is using her legs.
Both must refer to the same person since "exercises on a treadmill." involve "using her legs."
exists s1 x1 x2 x3.(a_topic(x1) & on(x1,x3) & n_treadmill(x3) & n_exercise(x1) & of(x1,x2) & n_girl(x2) & a_young(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_use(e1) & n_leg(x2) & of(x2,x1) & n_female(x1) & n_female(x1) & r_more(s1) & a_younger(s1) & Theme(s1,x1))