<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _extract_from_url(self, url):
 """Try to extract from the article URL - simple but might work as a fallback"""


        # Regex by Newspaper3k  - https://github.com/codelucas/newspaper/blob/master/newspaper/urls.py
        m = re.search(re_pub_date, url)
        if m:
            return self.parse_date_str(m.group(0))
        return None