(S (S (S (NP (NP (BASENP (NN Two) (NNS protesters)) (PP (IN in) (BASENP (DT the) (NNP United) (NNPS States)))) (SBAR (WHNP (WP who)) (S (VP (VBP are) (VP (VBN associated) (PP (IN with) (BASENP (DT the) (QT (DQL `) (NNP Tar) (NNPS Sands) (NNP Blockade) (DQR '))))))))) (VP (VBD were) (VP (VBN arrested) (BASENP (NNP Monday))))) (SBAR (IN after) (S (BASENP (PRP they)) (VP (VP (VBD barricaded) (BASENP (PRP themselves))) (PP (IN inside) (NP (BASENP (DT a) (NN portion)) (PP (IN of) (NP (BASENP (DT the) (NNP Keystone) (NNP Oil) (NNP Pipeline)) (PP (IN under) (NP (BASENP (NN construction)) (PP (IN in) (NP (BASENP (NNP Winona)) (COMMA ,) (BASENP (NNP Texas)))))))))))))) (PERIOD .))