( Tides ( ( are ( ( a ( rhythmic ( ( rise and ) fall ) ) ) ( of ( the ( ( oceans and ) seas ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Tides)) (VP (VBP are) (NP (NP (DT a) (JJ rhythmic) (NN rise) (CC and) (NN fall)) (PP (IN of) (NP (DT the) (NNS oceans) (CC and) (NNS seas))))) (. .)))
Tides are a rhythmic rise and fall of the oceans and seas.
(ROOT (S (NP (NNS Tides)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (SBAR (WHADVP (WRB when)) (S (NP (NP (DT the) (NN water)) (PP (IN of) (NP (DT the) (NN ocean)))) (ADVP (RB slowly)) (VP (VP (VBZ rises)) (CC and) (VP (VBZ falls)))))))) (. .)))