(S (S (BASENP (NNS Reporters) (FW sans) (FW frontières)) (VP (VBZ claims) (SBAR (SBAR (IN that) (S (BASENP (NNP Poland)) (VP (VBZ is) (NP (BASENP (DT the) (JJ only) (NNP European) (NNP Union) (NN country)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (BASENP (NN prison) (NNS sentences)) (VP (VBP are) (VP (VBN imposed) (PP (IN for) (QT (DQL ``) (NP (BASENP (NNS offences)) (PP (IN of) (BASENP (NN opinion)))) (DQR ''))))))))))) (CC and) (SBAR (IN that) (S (BASENP (DT this)) (VP (VBZ is) (NP (BASENP (DT the) (JJ first) (JJ such) (NN occurrence)) (PP (IN in) (BASENP (DT the) (NNP EU)))))))))) (PERIOD .))