( ( Semidiurnal tides ) ( ( are ( tides ( that ( have ( ( ( two highs ) and ) ( ( two lows ) ( each day ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Semidiurnal) (NNS tides)) (VP (VBP are) (NP (NP (NNS tides)) (SBAR (WHNP (WDT that)) (S (VP (VBP have) (NP (NP (CD two) (NNS highs)) (CC and) (NP (NP (CD two) (NNS lows)) (NP (DT each) (NN day))))))))) (. .)))
Semidiurnal tides are tides that have two highs and two lows 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)))) (. .)))