Radar data show the Otis fighters were airborne at 8:53.
( ( Radar data ) ( ( show ( ( the ( Otis fighters ) ) ( were ( airborne ( at 8:53 ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Radar) (NNS data)) (VP (VBP show) (SBAR (S (NP (DT the) (NNP Otis) (NNS fighters)) (VP (VBD were) (ADJP (JJ airborne) (PP (IN at) (NP (CD 8:53)))))))) (. .)))
The radar showed the fighter jets taking off at 8:53 AM.
( ( The radar ) ( ( ( showed ( the ( fighter jets ) ) ) ( ( taking off ) ( at ( 8:53 AM ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN radar)) (VP (VBD showed) (NP (DT the) (NN fighter) (NNS jets)) (S (VP (VBG taking) (PRT (RP off)) (PP (IN at) (NP (CD 8:53) (NNS AM)))))) (. .)))