valuable messages are forgotten 10 minutes after the last trombone 
(ROOT (S (NP (JJ valuable) (NNS messages)) (VP (VBP are) (VP (VBN forgotten) (PP (NP (CD 10) (NNS minutes)) (IN after) (NP (DT the) (JJ last) (NN trombone)))))))
(ROOT (S (NP (JJ ) (NNS )) (VP (VBP ) (VP (VBN ) (PP (NP (CD ) (NNS )) (IN ) (NP (DT ) (JJ ) (NN )))))))