( ( Unusual ( oceanic colorings ) ) ( ( have ( ( given ( rise ( to ( the terms ) ) ) ) ( ( ( red tide ) and ) ( black tide ) ) ) ) . ) )
(ROOT (S (NP (JJ Unusual) (JJ oceanic) (NNS colorings)) (VP (VBP have) (VP (VBN given) (NP (NP (NN rise)) (PP (TO to) (NP (DT the) (NNS terms)))) (NP (NP (JJ red) (NN tide)) (CC and) (NP (JJ black) (NN tide))))) (. .)))
Unusual oceanic colorings have given rise to the terms red tide and black tide.
(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)))))))) (. .)))