(S (S (BASENP (PRP They)) (VP (ADVP (RB also)) (VP (VBD found) (SBAR (S (BASENP (DT the) (JJ pregnant) (NNS mice)) (VP (VP (VBD had) (NP (BASENP (JJR higher) (NNS levels)) (PP (IN of) (NP (BASENP (NNS cells)) (VP (VBN called) (NP (BASENP (NNP oligodendrocytes)) (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (VBP create) (BASENP (NN myelin))))))))))) (CC and) (VP (VBP are) (ADJP (JJ able) (S (VP (TO to) (VP (VP (VB repair) (BASENP (DT some) (JJ damaged) (NNS neurons))) (PP (IN through) (BASENP (NN remyelination)))))))))))))) (PERIOD .))