( ( Tides Tides ) ( ( ( are ( the slowly ) ) ( ( changing ( ( ( rise and ) fall ) ( of ( ( the ( ocean ( and ( bay levels ) ) ) ) ( in response ) ) ) ) ) ( to ( interactions ( between ( ( ( ( ( ( the sun ) , ) moon ) , ) and ) earth ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Tides) (NNP Tides)) (VP (VBP are) (ADVP (DT the) (RB slowly)) (VP (VBG changing) (NP (NP (NN rise) (CC and) (NN fall)) (PP (IN of) (NP (NP (DT the) (NN ocean) (CC and) (NN bay) (NNS levels)) (PP (IN in) (NP (NN response)))))) (PP (TO to) (NP (NP (NNS interactions)) (PP (IN between) (NP (NP (DT the) (NN sun)) (, ,) (NP (NN moon)) (, ,) (CC and) (NP (NN earth)))))))) (. .)))
Tides Tides are the slowly changing rise and fall of the ocean and bay levels in response to interactions between the sun, moon, and earth.
(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)))))))) (. .)))