At 9:42, the Command Center learned from news reports that a plane had struck the Pentagon.
( ( At 9:42 ) ( , ( ( the ( Command Center ) ) ( ( ( learned ( from ( news reports ) ) ) ( that ( ( a plane ) ( had ( struck ( the Pentagon ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN At) (NP (CD 9:42))) (, ,) (NP (DT the) (NNP Command) (NNP Center)) (VP (VBD learned) (PP (IN from) (NP (NN news) (NNS reports))) (SBAR (IN that) (S (NP (DT a) (NN plane)) (VP (VBD had) (VP (VBN struck) (NP (DT the) (NNP Pentagon))))))) (. .)))
The plane had damaged one block of the Pentagon.
( ( The plane ) ( ( had ( damaged ( ( one block ) ( of ( the Pentagon ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN plane)) (VP (VBD had) (VP (VBN damaged) (NP (NP (CD one) (NN block)) (PP (IN of) (NP (DT the) (NNP Pentagon)))))) (. .)))