Two minutes later the transponder was turned off and even primary radar contact with the aircraft was lost.
( ( Two ( minutes later ) ) ( ( ( ( ( ( the transponder ) ( was ( turned off ) ) ) and ) even ) ( ( ( primary ( radar contact ) ) ( with ( the aircraft ) ) ) ( was lost ) ) ) . ) )
(ROOT (S (NP (CD Two) (NNS minutes) (RB later)) (S (NP (DT the) (NN transponder)) (VP (VBD was) (VP (VBN turned) (PRT (RP off))))) (CC and) (ADVP (RB even)) (S (NP (NP (JJ primary) (NN radar) (NN contact)) (PP (IN with) (NP (DT the) (NN aircraft)))) (VP (VBD was) (VP (VBN lost)))) (. .)))
Primary radar contact with the aircraft was lost.
( ( ( Primary ( radar contact ) ) ( with ( the aircraft ) ) ) ( ( was lost ) . ) )
(ROOT (S (NP (NP (JJ Primary) (NN radar) (NN contact)) (PP (IN with) (NP (DT the) (NN aircraft)))) (VP (VBD was) (VP (VBN lost))) (. .)))