def check_known_schemas(self):
if '<STR_LIT:image>' in self.article.opengraph:<EOL><INDENT>return self.get_image(self.article.opengraph["<STR_LIT:image>"],<EOL>extraction_type='<STR_LIT>')<EOL><DEDENT>elif (self.article.schema and '<STR_LIT:image>' in self.article.schema and<EOL>"<STR_LIT:url>" in self.article.schema["<STR_LIT:image>"]):<EOL><INDENT>return self.get_image(self.article.schema["<STR_LIT:image>"]["<STR_LIT:url>"],<EOL>extraction_type='<STR_LIT>')<EOL><DEDENT>return None<EOL>
\
        checks to see if we were able to find the image via known schemas:

        Supported Schemas
         - Open Graph
         - schema.org