Here is the the text i want to get from scraping, of course i want to get all the first divs that are an h3 first sibling

Here is my code
def get_post_comments(self):
REQUEST_URL = f'https://mbasic.facebook.com/story.php?story_fbid={self.post_id}&id=415518858611168'
soup = BeautifulSoup(self.parse_html(REQUEST_URL).content, "html.parser")
comments = [comment.get('h3') for comment in soup.find_all('h3').next_sibling]
print(comments)
I'm having multiple errors and i'm newbie