Yelp boss Jeremy Stoppelman. Steven E.F. Brown Web Editor- San Francisco Business Times Email  | Twitter Online restaurant review business Yelp Inc. lost $5.6 million in the fourth quarter, down from a loss of $9.1 million a year earlier in the same period. But the San Francisco company (NYSE: YELP) lost more for the full year…

Facebook’s new Graph Search emphasizes restaurants, but Yelp CEO Jeremy Stoppelman says no competitor is going to torpedo Yelp, at least “overnight,” because the Yelp community has “generated deep, rich content” that’s difficult to replicate. Stoppelman’s remarks were directed to financial analysts today after the company announced that its fourth quarter of 2012 loss narrowed…