Shortly thereafter, the passengers and flight crew began a series of calls from GTE airphones and cellular phones.
( ( Shortly thereafter ) ( , ( ( the ( passengers ( and ( flight crew ) ) ) ) ( ( ( began ( ( a series ) ( of calls ) ) ) ( from ( ( ( GTE airphones ) and ) ( cellular phones ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Shortly) (RB thereafter)) (, ,) (NP (DT the) (NNS passengers) (CC and) (NN flight) (NN crew)) (VP (VBD began) (NP (NP (DT a) (NN series)) (PP (IN of) (NP (NNS calls)))) (PP (IN from) (NP (NP (NNP GTE) (NNS airphones)) (CC and) (NP (JJ cellular) (NNS phones))))) (. .)))
Many had to try several times before a successful phone call.
( Many ( ( had ( to ( ( try ( several times ) ) ( before ( a ( successful ( phone call ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT Many)) (VP (VBD had) (S (VP (TO to) (VP (VB try) (NP (JJ several) (NNS times)) (PP (IN before) (NP (DT a) (JJ successful) (NN phone) (NN call))))))) (. .)))