Periodic Versus Continuous Review
( Periodic ( Versus ( Continuous Review ) ) )
(ROOT (NP (NNP Periodic) (NNP Versus) (NNP Continuous) (NNP Review)))
Periodic review versus no review
( ( Periodic review ) ( versus ( no review ) ) )
(ROOT (FRAG (NP (JJ Periodic) (NN review)) (PP (FW versus) (NP (DT no) (NN review)))))