( ( the time ) ( ( may ( extend ( to ( several hours ) ) ) ) ; ) )
(ROOT (S (NP (DT the) (NN time)) (VP (MD may) (VP (VB extend) (PP (TO to) (NP (JJ several) (NNS hours))))) (: ;)))
the time may extend to several hours;
(ROOT (S (NP (NNS Bacteria)) (VP (MD may) (VP (VB divide) (NP (NP (QP (JJ several) (NNS times))) (NP (DT an) (NN hour))))) (. .)))