( ( Spring ( Tides ( Spring tides ) ) ) ( ( ( ( ( ( ( do not ) only ) ( occur ( in ( the spring ) ) ) ) , ) but ) ( ( every ( two weeks ) ) ( when ( ( the ( ( sun and ) moon ) ) ( are ( in ( ( ( ( conjunction ( -LRB- ( ( New Moon ) -RRB- ) ) ) or ) opposition ) ( -LRB- ( ( Full Moon ) -RRB- ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Spring) (NNP Tides) (NNP Spring) (NNS tides)) (VP (VP (VBP do) (RB not) (ADVP (RB only)) (VP (VB occur) (PP (IN in) (NP (DT the) (NN spring))))) (, ,) (CC but) (VP (NP (DT every) (CD two) (NNS weeks)) (SBAR (WHADVP (WRB when)) (S (NP (DT the) (NN sun) (CC and) (NN moon)) (VP (VBP are) (PP (IN in) (NP (NP (NN conjunction)) (PRN (-LRB- -LRB-) (NP (NNP New) (NNP Moon)) (-RRB- -RRB-)) (CC or) (NP (NN opposition)) (PRN (-LRB- -LRB-) (NP (NNP Full) (NNP Moon)) (-RRB- -RRB-))))))))) (. .)))
Spring Tides Spring tides do not only occur in the spring, but every two weeks when the sun and moon are in conjunction (New Moon) or opposition (Full Moon).
(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)))))) (. .)))