PERSON@1 's sister PERSON@2 and her husband PERSON@3 had been teaching PERSON@4 's newborn cousin , PERSON@5 , how to sign , and he grew to learn it quickly as well .

PERSON@1 's sister PERSON@2 and her husband PERSON@3 were teaching PERSON@4 's baby cousin , PERSON@5 , how to sign , and he learned it quickly also .
