It 's definitely still a puzzle , and we 're trying to figure out the different components to it , '' said Rachel Barr , a psychologist at Georgetown University who specializes in infant memory .
Rachel Barr /business/person/company Georgetown University
PRP VBZ RB RB DT NN , CC PRP VBP VBG TO VB RP DT JJ NNS TO PRP , '' VBD NNP NNP , DT NN IN NNP NNP WP VBZ IN NN NN .
Rachel Barr
PERSON
Georgetown University
ORGANIZATION
/business/person/company