( ( ( ( Two high ) and ) ( two ( low tides ) ) ) ( ( occur ( every day ) ) . ) )
(ROOT (S (NP (NP (CD Two) (NN high)) (CC and) (NP (CD two) (JJ low) (NNS tides))) (VP (VBP occur) (NP (DT every) (NN day))) (. .)))
Two high and two low tides occur every 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)))) (. .)))