a frightening and compelling ` what if 
(ROOT (FRAG (ADJP (DT a) (JJ frightening) (CC and) (JJ compelling)) (`` `) (WHNP (WP what)) (IN if)))
(ROOT (FRAG (ADJP (DT ) (JJ ) (CC ) (JJ )) (`` ) (WHNP (WP )) (IN )))