def abstract_json(soup):
abstract_tags = raw_parser.abstract(soup)<EOL>abstract_json = None<EOL>for tag in abstract_tags:<EOL><INDENT>if tag.get("<STR_LIT>") is None:<EOL><INDENT>abstract_json = render_abstract_json(tag)<EOL><DEDENT><DEDENT>return abstract_json<EOL>
abstract in article json format