One recipient of a call from the aircraft recounted specifically asking her caller whether the hijackers had guns.
( ( ( One recipient ) ( of ( ( a call ) ( from ( the aircraft ) ) ) ) ) ( ( ( recounted ( specifically ( asking ( her caller ) ) ) ) ( whether ( ( the hijackers ) ( had guns ) ) ) ) . ) )
(ROOT (S (NP (NP (CD One) (NNS recipient)) (PP (IN of) (NP (NP (DT a) (NN call)) (PP (IN from) (NP (DT the) (NN aircraft)))))) (VP (VBD recounted) (S (ADVP (RB specifically)) (VP (VBG asking) (NP (PRP$ her) (NN caller)))) (SBAR (IN whether) (S (NP (DT the) (NNS hijackers)) (VP (VBD had) (NP (NNS guns)))))) (. .)))
Somebody who received a call from the plane asked her caller if the hijackers had sticks.
( ( Somebody ( who ( ( received ( a call ) ) ( from ( the plane ) ) ) ) ) ( ( ( asked ( her caller ) ) ( if ( ( the hijackers ) ( had sticks ) ) ) ) . ) )
(ROOT (S (NP (NP (NN Somebody)) (SBAR (WHNP (WP who)) (S (VP (VBD received) (NP (DT a) (NN call)) (PP (IN from) (NP (DT the) (NN plane))))))) (VP (VBD asked) (NP (PRP$ her) (NN caller)) (SBAR (IN if) (S (NP (DT the) (NNS hijackers)) (VP (VBD had) (VP (VBZ sticks)))))) (. .)))