One of them turns out to be God , who promises that Abraham 's aged wife , Sarah , will bear a son , Isaac .
Abraham /people/person/children Isaac
CD IN PRP VBZ RP TO VB NNP , WP VBZ DT NNP POS JJ NN , NNP , MD VB DT NN , NNP .
Abraham
PERSON
Isaac
PERSON
/people/person/children