( Tornadoes ( ( can ( happen ( ( ( at ( ( any time ) ( of ( the year ) ) ) ) and ) ( at ( ( any time ) ( of ( the day ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Tornadoes)) (VP (MD can) (VP (VB happen) (PP (PP (IN at) (NP (NP (DT any) (NN time)) (PP (IN of) (NP (DT the) (NN year))))) (CC and) (PP (IN at) (NP (NP (DT any) (NN time)) (PP (IN of) (NP (DT the) (NN day)))))))) (. .)))
Tornadoes can happen at any     time of the year and at any time of the day.
(ROOT (S (NP (NNS Tornadoes)) (VP (MD can) (VP (VB occur) (PP (IN in) (NP (DT any))))) (. .)))