three young girls learn ballet.
A girl learns how to tap dance.
Three young girls are more than a single girl.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_learn(e1) & n_ballet(x2) & n_girl(x1) & a_young(s1) & Theme(s1,x1) & card_eq_3(x1))
exists e1 x1 x2.(Topic(e1,x2) & Actor(e1,x1) & v_learn(e1) & n_manner(x2) & exists e2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_tap(e2) & n_dance(x4)) & n_girl(x1))