The link is to a story by John Tedesco of the San Antonio Times about Google search guru Daniel Russell who posed a daunting challenge to a room full of investigative journalists:
What’s the phone number of the office where this picture was snapped?
I managed to find an answer I'm pretty sure is right, but there is still some conjecture involved. If you'd like to solve Russell's challenge, go ahead. Answers are easy to find, thanks to Google. Here's Russell's blog, and some answers. Did I/they get it right?