title: Beautiful Soup Can't Find Tags
body: <p>I am currently trying to practice with the requests and BeautifulSoup Modules in Python 3.6 and have run into an issue that I can't seem to find any info on in other questions and answers. </p>
  
  <p>It seems that at some point in the page, Beuatiful Soup stops recognizing tags and Ids. I am trying to pull Play-by-play data from a page like this:</p>
  
  <p><a href="http://www.pro-football-reference.com/boxscores/201609080den.htm" rel="noreferrer">http://www.pro-football-reference.com/boxscores/201609080den.htm</a></p>
  
  <pre><code>import requests, bs4
  
  source_url = 'http://www.pro-football-reference.com/boxscores/201609080den.htm'
  res = requests.get(source_url)
  if '404' in res.url:
      raise Exception('No data found for this link: '+source_url)
  
  soup = bs4.BeautifulSoup(res.text,'html.parser')
  
  #this works
  all_pbp = soup.findAll('div', {'id' : 'all_pbp'})
  print(len(all_pbp))
  
  #this doesn't
  table = soup.findAll('table', {'id' : 'pbp'})
  print(len(table))
  </code></pre>
  
  <p>Using the inspector in Chrome, I can see that the table definitely exists. I have also tried to use it on 'div's and 'tr's in the later half of the HTML and it doesn't seem to work. I have tried the standard 'html.parser' as well as lxml and html5lib, but nothing seems to work. </p>
  
  <p>Am I doing something wrong here, or is there something in the HTML or its formatting that prevents BeautifulSoup from correctly finding the later tags? I have run into issues with similar pages run by this company (hockey-reference.com, basketball-reference.com), but have been able to use these tools properly on other sites. </p>
  
  <p>If it is something with the HTML, is there any better tool/library for helping to extract this info out there?</p>
  
  <p>Thank you for your help,
  BF</p>