will be occupied for 72 minutes . 
(ROOT (S (VP (MD will) (VP (VB be) (VP (VBN occupied) (PP (IN for) (NP (CD 72) (NNS minutes)))))) (. .)))
(ROOT (S (VP (MD ) (VP (VB ) (VP (VBN ) (PP (IN ) (NP (CD ) (NNS )))))) (. )))