( Tides ( ( are ( the ( earth ( , ( moon ( , ( sun system ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Tides)) (VP (VBP are) (NP (DT the) (NN earth) (, ,) (NN moon) (, ,) (NN sun) (NN system))) (. .)))
Tides are the earth, moon, sun system.
(ROOT (S (NP (NNP Spring) (NNS tides)) (VP (VBP are) (VP (VBN created) (SBAR (WHADVP (WRB when)) (S (NP (NP (DT the) (NN sun)) (CC and) (NP (NP (NN moon) (POS 's)) (NNS tides))) (VP (VBP match)))))) (. .)))