PLOT = [
'Plot summary', 'Plot', 'Plot introduction',
'Synopsis', 'Summary', 'Plot synopsis',
'Overview', 'Story', 'Description' , 'Contents?'
]
HEADING_RE = re.compile(
r'^ *=+\s*(%s)\s*=+' % '|'.join(PLOT),
re.IGNORECASE | re.UNICODE | re.MULTILINE)