And who should decide?
( And ( who ( ( should decide ) ? ) ) )
(ROOT (SBARQ (CC And) (WHNP (WP who)) (SQ (VP (MD should) (VP (VB decide)))) (. ?)))
Someone should make the decision.
( Someone ( ( should ( make ( the decision ) ) ) . ) )
(ROOT (S (NP (NN Someone)) (VP (MD should) (VP (VB make) (NP (DT the) (NN decision)))) (. .)))