def references_date(year=None):
date = None<EOL>discriminator = None<EOL>in_press = None<EOL>if year and "<STR_LIT>" in year.lower().strip():<EOL><INDENT>in_press = True<EOL><DEDENT>elif year and re.match("<STR_LIT>", year):<EOL><INDENT>date = year<EOL><DEDENT>elif year:<EOL><INDENT>discriminator_match = re.match("<STR_LIT>", year)<EOL>if discriminator_match:<EOL><INDENT>date = discriminator_match.group(<NUM_LIT:1>)<EOL>discriminator = discriminator_match.group(<NUM_LIT:2>)<EOL><DEDENT>else:<EOL><INDENT>date = year<EOL><DEDENT><DEDENT>return (date, discriminator, in_press)<EOL>
Handle year value parsing for some edge cases