(S (S (NP (BASENP (JJ Many) (NNS supermarkets)) (PP (IN in) (BASENP (DT the) (NNP European) (NNP Union)))) (VP (VBP have) (VP (ADVP (RB voluntarily)) (VP (VBN adopted) (NP (NP (BASENP (NNS methods)) (SBAR (S (VP (TO to) (VP (VB reduce) (NP (BASENP (NN usage)) (PP (IN of) (BASENP (JJ plastic) (NNS bags))))))))) (COMMA ,) (SBAR (WHNP (WDT which)) (S (ADVP (RB often)) (VP (ADVP (RB also)) (VP (VBP consist) (PP (IN of) (S (S (S (VP (VBG charging) (PP (IN for) (BASENP (NNS bags))))) (PRN (LRB -LRB-) (NP (ADVP (FW e.g.)) (BASENP (NNP Germany))) (RRB -RRB-))) (CC or) (S (VP (VP (VBG rewarding) (BASENP (NN customer) (NN loyalty) (NNS points))) (PP (IN for) (S (VP (VBG returning) (BASENP (VBN used) (NN carrier) (NNS bags)))))))))))))))))) (PERIOD .))