I made this search :
And got a topic with answers obscured.
I then selected a portion of the obscured text and made this query :
https://www.google.com/search?q=python+vs+php+"Here are just a few reasons based on my"
Came up with the original obscured answer on that very same question :
Check out that page's source. You'll note the canonical URL is the original question.
<link rel="canonical" href="http://www.quora.com/Python-programming-language-1/Which-is-better-PHP-or-Python-Why" />
Edit: Link to webmaster guidelines on rel="canonical" :
Adding this link and attribute lets site owners identify sets of identical
content and suggest to Google: "Of all these pages with identical content,
this page is the most useful. Please prioritize it in search results."