rtokens: That 's when the wreckage was discovered , " Snow said .
pos: " PRP VBD PRP IN VBG VBG IN RB CD ( CD RB NNP ) ( CD NNP ) .
tokens: " We considered it as being missing until about 0600 ( 4:30 A.M. EST ) ( 0930 GMT ) .
ltokens: That was the last communication the aircraft made with the airport , he added .