The President and the Vice President The President was seated in a classroom when, at 9:05, Andrew Card whispered to  A second plane hit the second tower.
( ( ( ( The President ) and ) ( the ( Vice ( President ( The President ) ) ) ) ) ( ( was ( seated ( in ( ( a classroom ) ( when ( , ( ( at 9:05 ) ( , ( ( ( Andrew Card ) ( whispered ( to ( A ( second plane ) ) ) ) ) ( hit ( the ( second tower ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNP President)) (CC and) (NP (DT the) (NNP Vice) (NNP President) (NNP The) (NNP President))) (VP (VBD was) (VP (VBN seated) (PP (IN in) (NP (NP (DT a) (NN classroom)) (SBAR (WHADVP (WRB when)) (S (, ,) (PP (IN at) (NP (CD 9:05))) (, ,) (NP (NP (NNP Andrew) (NNP Card)) (VP (VBN whispered) (PP (TO to) (NP (DT A) (JJ second) (NN plane))))) (VP (VBD hit) (NP (DT the) (JJ second) (NN tower))))))))) (. .)))
The President was in the Oval Office when the second plane hit.
( ( The President ) ( ( ( was ( in ( the ( Oval Office ) ) ) ) ( when ( ( the ( second plane ) ) hit ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP President)) (VP (VBD was) (PP (IN in) (NP (DT the) (NNP Oval) (NNP Office))) (SBAR (WHADVP (WRB when)) (S (NP (DT the) (JJ second) (NN plane)) (VP (VBD hit))))) (. .)))