(S (S (NP (BASENP (DT The) (NN two) (NNS astronauts)) (PRN (COMMA ,) (VP (VBG working) (PP (IN in) (BASENP (JJ Russian) (NN space) (NNS suits)))) (COMMA ,))) (VP (VBD performed) (NP (BASENP (DT a) (NN variety)) (PP (IN of) (BASENP (NNS tasks)))))) (PERIOD .))