Flipboard Engineering published a blog post on solving this problem <a href="http:&#x2F;&#x2F;engineering.flipboard.com&#x2F;2014&#x2F;10&#x2F;summarization&#x2F;" rel="nofollow">http:&#x2F;&#x2F;engineering.flipboard.com&#x2F;2014&#x2F;10&#x2F;summarization&#x2F;</a>