A ballerina is standing on one to with her arms reaching out.
They are reaching for a helping hand.
A ballerina refers to one woman.  They refers to plural form.
exists e1 e2 s1 s2 x1 x2 x3.(a_out(s2) & Manner(e2,s2) & Actor(e2,x3) & v_reach(e2) & with(e1,x3) & n_arm(x3) & of(x3,x1) & n_female(x1) & a_to(s1) & Manner(e1,s1) & on(e1,x2) & n_thing(x2) & card_eq_1(x2) & Actor(e1,x1) & v_stand(e1) & n_ballerina(x1))
exists e1 e2 x1.(for(e1,x1) & n_hand(x1) & Actor(e2,x1) & v_help(e2) & Actor(e1,x1) & v_reach(e1) & n_thing(x1))