So, which one of you ladies wants to go first.
( So ( , ( ( ( which one ) ( of ( you ladies ) ) ) ( ( wants ( to ( go first ) ) ) . ) ) ) )
(ROOT (SBARQ (RB So) (, ,) (WHNP (WHNP (WDT which) (NN one)) (PP (IN of) (NP (PRP you) (NNS ladies)))) (SQ (VP (VBZ wants) (S (VP (TO to) (VP (VB go) (ADVP (RB first))))))) (. .)))
There is a question of who should go first.
( There ( ( is ( ( a question ) ( of ( who ( should ( go first ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBZ is) (NP (NP (DT a) (NN question)) (PP (IN of) (SBAR (WHNP (WP who)) (S (VP (MD should) (VP (VB go) (ADVP (RB first))))))))) (. .)))