A young female swimming in a pool.
A girl is exercising.
A young female is a girl, swimming is a form of exercising.
exists s1 s2 x1 x2.(a_topic(x1) & in(x1,x2) & n_pool(x2) & n_swimming(x1) & a_female(s2) & Theme(s2,x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1.(Actor(e1,x1) & v_exercise(e1) & n_girl(x1))