( ( Generally speaking ) ( , ( ( tidal cycles ) ( ( contain ( ( ( two ( high tides ) ) and ) ( ( two ( low tides ) ) ( each day ) ) ) ) . ) ) ) )
(ROOT (S (S (ADVP (RB Generally)) (VP (VBG speaking))) (, ,) (NP (JJ tidal) (NNS cycles)) (VP (VBP contain) (NP (NP (CD two) (JJ high) (NNS tides)) (CC and) (NP (NP (CD two) (JJ low) (NNS tides)) (NP (DT each) (NN day))))) (. .)))
Generally speaking, tidal cycles contain two high tides and two low tides each day.
(ROOT (S (NP (NP (CD Two) (NN low)) (CC and) (NP (JJ high) (NNS tides))) (VP (VBP occur) (PP (IN per) (NP (NN day)))) (. .)))