F-15 fighters were scrambled at 8:46 from Otis Air Force Base.
( ( F-15 fighters ) ( ( were ( ( scrambled ( at 8:46 ) ) ( from ( Otis ( Air ( Force Base ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN F-15) (NNS fighters)) (VP (VBD were) (VP (VBD scrambled) (PP (IN at) (NP (CD 8:46))) (PP (IN from) (NP (NNP Otis) (NNP Air) (NNP Force) (NNP Base))))) (. .)))
Otis Air Force Base did not send off any fighter planes.
( ( Otis ( Air ( Force Base ) ) ) ( ( ( did not ) ( ( send off ) ( any ( fighter planes ) ) ) ) . ) )
(ROOT (S (NP (NNP Otis) (NNP Air) (NNP Force) (NNP Base)) (VP (VBD did) (RB not) (VP (VB send) (PRT (RP off)) (NP (DT any) (NN fighter) (NNS planes)))) (. .)))