He learned in the tunnel that the Pentagon had been hit, and he saw television coverage of smoke coming from the building.
( ( ( ( ( He ( ( learned ( in ( the tunnel ) ) ) ( that ( ( the Pentagon ) ( had ( been hit ) ) ) ) ) ) , ) and ) ( he ( saw ( ( television coverage ) ( of ( smoke ( coming ( from ( the building ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (PRP He)) (VP (VBD learned) (PP (IN in) (NP (DT the) (NN tunnel))) (SBAR (IN that) (S (NP (DT the) (NNP Pentagon)) (VP (VBD had) (VP (VBN been) (VP (VBN hit)))))))) (, ,) (CC and) (S (NP (PRP he)) (VP (VBD saw) (NP (NP (NN television) (NN coverage)) (PP (IN of) (NP (NP (NN smoke)) (VP (VBG coming) (PP (IN from) (NP (DT the) (NN building))))))))) (. .)))
He got out of the tunnel quickly when he heard about the Pentagon.  
( He ( ( ( ( got out ) ( of ( the tunnel ) ) ) ( ( quickly when ) ( he ( heard ( about ( the Pentagon ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD got) (PRT (RP out)) (PP (IN of) (NP (DT the) (NN tunnel))) (SBAR (WHADVP (RB quickly) (WRB when)) (S (NP (PRP he)) (VP (VBD heard) (PP (IN about) (NP (DT the) (NNP Pentagon))))))) (. .)))