input: Write a python function to parse HTML content and extract data from 'div' tags with the class 'content'.
  assert len(parse_html("http://example.com")) > 0
  assert all(isinstance(tag, BeautifulSoup) for tag in parse_html("http://example.com"))
output: def parse_html(url):
      import requests
      from bs4 import BeautifulSoup
  
      response = requests.get(url)
      soup = BeautifulSoup(response.content, 'html.parser')
      return soup.find_all('div', class_='content')