( Eventually ( , ( Ringo ( ( ( ( decided ( to ( help ( ( educate ( the people ) ) ( in ( communities ( affected ( by ( petrochemical pollution ) ) ) ) ) ) ) ) ) , ) ( ( ( ( teaching them ) ( how ( to ( effectively ( ( ( stop ( ( the discharge ) ( of chemicals ) ) ) ( into neighborhoods ) ) ( around refineries ) ) ) ) ) ) , ) ( leading ( to ( ( the beginning ) ( of ( his ( environmental activism ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Eventually)) (, ,) (NP (NNP Ringo)) (VP (VBD decided) (S (VP (TO to) (VP (VB help) (VP (VB educate) (NP (DT the) (NNS people)) (PP (IN in) (NP (NP (NNS communities)) (VP (VBN affected) (PP (IN by) (NP (NN petrochemical) (NN pollution)))))))))) (, ,) (S (VP (VP (VBG teaching) (NP (PRP them)) (SBAR (WHADVP (WRB how)) (S (VP (TO to) (VP (ADVP (RB effectively)) (VB stop) (NP (NP (DT the) (NN discharge)) (PP (IN of) (NP (NNS chemicals)))) (PP (IN into) (NP (NNS neighborhoods))) (PP (IN around) (NP (NNS refineries)))))))) (, ,) (VP (VBG leading) (PP (TO to) (NP (NP (DT the) (NN beginning)) (PP (IN of) (NP (PRP$ his) (JJ environmental) (NN activism))))))))) (. .)))
Eventually, Ringo decided to help educate the people in communities affected by petrochemical pollution, teaching them how to effectively stop the discharge of chemicals into neighborhoods around refineries, leading to the beginning of his environmental activism.
(ROOT (S (NP (NNS People)) (VP (VBD stopped) (S (VP (VBG adding) (NP (NN lead)) (PP (TO to) (NP (NP (NN gasoline)) (PP (RB because) (IN of) (NP (JJ environmental) (NN pollution)))))))) (. .)))