(S (S (ADVP (RB However)) (COMMA ,) (S (SBAR (IN while) (S (NP (BASENP (DT the) (NN set)) (PP (IN of) (BASENP (NNS patients)))) (VP (VBD was) (VP (ADVP (RB evenly)) (VBN split))))) (COMMA ,) (S (S (NP (BASENP (QP (RB only) (NN 7)) (NNS patients)) (SBAR (WHNP (WP who)) (S (VP (VBD received) (BASENP (NN MIT) (NN therapy)))))) (VP (VBD died))) (CONJP (COMMA ,) (CC and)) (S (NP (BASENP (NN 20) (NNS patients)) (SBAR (WHNP (WP who)) (S (VP (VP (VBD did) (RB not)) (VP (VB receive) (BASENP (PRP it))))))) (VP (VBD died)))))) (PERIOD .))