At 9:32, a hijacker, probably Jarrah, made or attempted to make the following announcement to the passengers of Flight 93:Ladies and  Here the captain, please sit down keep remaining sitting.
( ( At 9:32 ) ( , ( ( ( a hijacker ) ( , ( probably ( Jarrah , ) ) ) ) ( ( ( ( ( made or ) ( attempted ( to ( ( make ( the ( following announcement ) ) ) ( to ( ( ( ( the passengers ) ( of ( Flight 93 ) ) ) : ) ( ( ( Ladies and ) Here ) ( the captain ) ) ) ) ) ) ) ) ( , please ) ) ( ( sit down ) ( keep ( remaining sitting ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN At) (NP (CD 9:32))) (, ,) (NP (NP (DT a) (NN hijacker)) (PRN (, ,) (ADVP (RB probably)) (NP (NNP Jarrah)) (, ,))) (VP (VP (VBD made)) (CC or) (VP (VBD attempted) (S (VP (TO to) (VP (VB make) (NP (DT the) (JJ following) (NN announcement)) (PP (TO to) (NP (NP (NP (DT the) (NNS passengers)) (PP (IN of) (NP (NNP Flight) (CD 93)))) (: :) (NP (NP (NNP Ladies)) (CC and) (ADVP (RB Here)) (NP (DT the) (NN captain))))))))) (PRN (, ,) (INTJ (VB please))) (VP (VBP sit) (PRT (RP down)) (S (VP (VB keep) (NP (NP (VBG remaining)) (VP (VBG sitting))))))) (. .)))
Jarrah succeeded in convincing the passengers to stay calm thanks to his efforts at 9:32.
( Jarrah ( ( succeeded ( in ( convincing ( ( the passengers ) ( to ( ( ( stay calm ) ( thanks ( to ( his efforts ) ) ) ) ( at 9:32 ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Jarrah)) (VP (VBD succeeded) (PP (IN in) (S (VP (VBG convincing) (S (NP (DT the) (NNS passengers)) (VP (TO to) (VP (VB stay) (ADJP (JJ calm)) (ADVP (NNS thanks) (PP (TO to) (NP (PRP$ his) (NNS efforts)))) (PP (IN at) (NP (CD 9:32)))))))))) (. .)))