code: def caption_mentions(self) -> List[str]:
          
          if not self.caption:
              return []
          # This regular expression is from jStassen, adjusted to use Python's \w to support Unicode
          # http://blog.jstassen.com/2016/03/code-regex-for-instagram-username-and-hashtags/
          mention_regex = re.compile(r"(?:@)(\w(?:(?:\w|(?:\.(?!\.))){0,28}(?:\w))?)")
          return re.findall(mention_regex, self.caption.lower())
docs: List of all lowercased profiles that are mentioned in the Post's caption, without preceeding @.