Because Ballinger was still responsible for his other flights as well as Flight 175, his warning message was not transmitted to Flight 93 until 9:23.
( ( Because ( Ballinger ( ( was still ) ( responsible ( for ( ( ( his ( other flights ) ) ( as ( well as ) ) ) ( Flight 175 ) ) ) ) ) ) ) ( , ( ( his ( warning message ) ) ( ( ( was not ) ( ( transmitted ( to ( Flight 93 ) ) ) ( until 9:23 ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN Because) (S (NP (NNP Ballinger)) (VP (VBD was) (ADVP (RB still)) (ADJP (JJ responsible) (PP (IN for) (NP (NP (PRP$ his) (JJ other) (NNS flights)) (CONJP (RB as) (RB well) (IN as)) (NP (NNP Flight) (CD 175)))))))) (, ,) (NP (PRP$ his) (NN warning) (NN message)) (VP (VBD was) (RB not) (VP (VBN transmitted) (PP (TO to) (NP (NNP Flight) (CD 93))) (PP (IN until) (NP (CD 9:23))))) (. .)))
What Ballinger said was immediately spread.
( ( What ( Ballinger said ) ) ( ( was ( immediately spread ) ) . ) )
(ROOT (S (SBAR (WHNP (WP What)) (S (NP (NNP Ballinger)) (VP (VBD said)))) (VP (VBD was) (VP (ADVP (RB immediately)) (VBN spread))) (. .)))