(S (S (ADVP (RB However)) (COMMA ,) (S (SBAR (IN as) (S (NP (EX there)) (VP (VP (VBD were) (BASENP (QP (RB only) (NN 10)) (NNS people))) (PP (IN in) (NP (BASENP (DT the) (JJ experimental) (NN group)) (PRN (LRB -LRB-) (NP (CC and) (NP (BASENP (DT another) (NN 10)) (PP (IN in) (BASENP (DT the) (NN control) (NN group))))) (RRB -RRB-))))))) (COMMA ,) (S (BASENP (DT this)) (VP (VP (VBZ is) (RB not)) (BASENP (DT a) (ADJP (RB statistically) (JJ significant)) (NN sample)))))) (PERIOD .))