(S (S (BASENP (NNP Griffin)) (VP (VP (VP (VBD was) (ADJP (JJ critical))) (PP (IN at) (NP (BASENP (NNS times)) (PP (IN of) (NP (BASENP (NNP U.S.) (NNS priorities)) (PP (IN in) (BASENP (NN space) (NN exploration)))))))) (PP (IN by) (S (VP (VBG questioning) (NP (BASENP (PRPD its) (JJ continued) (NN commitment)) (PP (TO to) (BASENP (DT the) (NNP International) (NNP Space) (NNP Station))))))))) (PERIOD .))