(S (S (NP (BASENP (DT The) (NN strain)) (PP (IN of) (BASENP (DT the) (NN disease)))) (VP (VP (VBD had) (VP (ADVP (RB already)) (VP (VBN been) (VP (VBN identified) (PP (IN as) (NP (BASENP (DT an) (ADJP (JJ O1) (JJ BFS67-like)) (NN virus)) (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (VBD was) (VP (VBN isolated) (PP (IN in) (BASENP (DT a) (NN 1967) (NN outbreak))))))))))))) (CC and) (VP (VBD was) (VP (VBG being) (VP (VP (VBN used) (PP (IN at) (BASENP (DT the) (NNS labs)))) (PP (IN for) (NP (BASENP (NN research)) (CC and) (NP (BASENP (DT the) (NN production)) (PP (IN of) (BASENP (NNS vaccines))))))))))) (PERIOD .))