(S (S (SBAR (IN Although) (S (BASENP (PRPD its) (JJ first) (NN priority)) (VP (MD will) (VP (VB be) (S (VP (TO to) (VP (VB test) (NP (BASENP (PRPD its) (NN operation)) (PP (IN in) (BASENP (NN microgravity))))))))))) (COMMA ,) (S (BASENP (NNS upgrades)) (VP (MD could) (VP (ADVP (RB eventually)) (VP (VB allow) (S (BASENP (PRP it)) (VP (TO to) (VP (VB fulfill) (NP (BASENP (PRPD its) (JJ ultimate) (NN purpose)) (PP (IN of) (S (VP (VP (VBG becoming) (BASENP (DT an) (NN astronaut) (NN helper))) (PP (IN on) (BASENP (ADJP (JJ boring) (CC or) (JJ dangerous)) (NNS tasks))))))))))))))) (PERIOD .))