Question:  Harrah's Lake Tahoe is a hotel and casino owned and operated by the fourth-largest gaming company in the world, with annual revenues of what in 2013?

Context paragraphs:
Sierra-at-Tahoe: Sierra-at-Tahoe is a ski and snowboard resort in Twin Bridges, California south of Lake Tahoe.  Sierra-at-Tahoe is approximately 16 miles (26 km) south of Stateline, Nevada and 12 miles south of South Lake Tahoe on U.S. Route 50 and is contained within the Eldorado National Forest.  Sierra-at-Tahoe (often shortened to "Sierra") is a medium sized ski area in the Lake Tahoe region, and is well known for being a more family oriented resort and also having a high annual snowfall.  Sierra-at-Tahoe's terrain is 25 percent beginner, 50 percent Intermediate, and 25 percent advanced.

SS Tahoe: SS "Tahoe" was a steamship that operated on Lake Tahoe at the end of the 19th century and first half of the 20th.  Scuttled in 1940, the wreck presently lies in 400 ft of water off Glenbrook, Nevada.  The wreck was first visited in 2002 by a team from New Millennium Dive Expeditions (NMDE) in a record-setting high-altitude dive for Lake Tahoe.  As a result of the work that NMDE did on the "Tahoe" site from 1999 up to their dives in 2002, "Tahoe" became the first maritime site in Nevada to be listed in the National Register of Historic Places.

Tahoe Air: Tahoe Air was a United States airline founded by Mark Sando, who used Casino Express Airlines to fund their plane purchase.  Tahoe Air offered jet flights directly out of South Lake Tahoe via the South Lake Tahoe Airport.

Lake Tahoe Concours d'Elegance: The Lake Tahoe Concours d'Elegance is an event held at Lake Tahoe yearly, and serves as one of the most prestigious judging events for classic wooden boats.  The event, held over a two- to three-day span in August of every year (with the years 2009 and 2010 being exceptions, held in June), started in 1972 by wooden boat enthusiasts and experts of Lake Tahoe to judge boats much like in a car concours.  Now officially hosted by the Tahoe Yacht Club, since 1994, the show has become a renowned event in the wooden boat world.  Each year the show raises money for charitable donation, with $32,000 being donated in 2010, with total donations from 1994 to present have totaled over $200,000.

Hard Rock Hotel and Casino (Stateline): Hard Rock Lake Tahoe (formerly Sahara Tahoe, High Sierra, Horizon Lake Tahoe and Park Tahoe) is a hotel and casino located in Stateline, Nevada.  Also previously known as Sahara Tahoe and High Sierra resorts, it is one of four major casino hotels in Stateline.  Horizon Lake Tahoe closed on April 1, 2014, to begin a $60 million renovation and rebranding as Hard Rock Lake Tahoe, which held its grand opening on January 28, 2015.

Caesars Entertainment Corporation: Caesars Entertainment Corporation, is an American gaming corporation based in Paradise, Nevada that owns and operates over 50 casinos and hotels, and seven golf courses under several brands.  It is the fourth-largest gaming company in the world, with annual revenues of $8.6 billion (2013).  Caesars is a public company, majority-owned by a group of private equity firms led by Apollo Global Management and TPG Capital.

SaltCreek Casino: SaltCreek Casino, located in Pocasset, Oklahoma, is the first casino to open in Grady County, Oklahoma.  It is the 18th casino owned and operated by the Chickasaw Nation.  The casino held a ribbon cutting ceremony on December 18, 2012 and officially opened its doors on December 31, 2012.  The 36000 sqft casino, features over 550 different gaming stations, as well as four tables for three-card poker, blackjack and Texas hold 'em.

Bill's Casino Lake Tahoe: Bill's Lake Tahoe was a casino located in Stateline, Nevada owned and operated by and connected to next-door Harrah's Lake Tahoe.

Tahoe Donner: Tahoe Donner is a ski resort & home owners association which offers many different amenities and impressive architecturally designed real estate.  Tahoe Donner is located in California, five miles from Donner Lake and less than 20 miles from Lake Tahoe in the Sierra Nevada.  The ski area usually opens 24–36 hours after receiving 2–3 feet of snow.  Tahoe Donner Downhill Ski Area is owned and operated by the Tahoe Donner Association, one of America’s largest homeowner’s associations, with nearly 5,800 properties and 25,000 members enjoying over 7,000 acres in the Sierra Nevada mountains.  Tahoe Donner attracts vacation renters from all around the world.

Harrah's Lake Tahoe: Harrah's Lake Tahoe is a hotel and casino located in Stateline, Nevada.  It is branded with the name of its former owner and operator William F. Harrah and owned and operated by Caesars Entertainment Corporation.  The 18-story tower and 525 rooms, plus 65000 sqft of casino make it one of the largest resorts at South Lake Tahoe.

Supporting paragraphs: Harrah's Lake Tahoe Caesars Entertainment Corporation
Answer: $8.6 billion