def bills(self):
for bill in self['<STR_LIT>']:<EOL><INDENT>yield bill<EOL><DEDENT>
Aliases the inaccesible underscore names and mislabed "bill_id"
        field on event['related_bills'], which points to the mongo id,
        whereas everywhere else bill_id refers to the human id like "HB 123."

        The names were updated by 1f24792 on 12/18/12.