Question: The Palazzo is part of a larger complex, comprizing the Venetian Resort and Casino and a large convention center that was the second largest convention in the world when it opened in what year?

Context paragraphs:
Georgia International Convention Center: The Georgia International Convention Center or GICC, opened in April 2009, is the second largest convention center in the U.S. state of Georgia, second only to the Georgia World Congress Center.  It is located at 2000 Convention Center Concourse, just off Camp Creek Parkway (S.R. 6) and Roosevelt Highway (U.S. 29) in College Park.  The Convention Center is accessible from the Airport MARTA station (via a connection to the ATL Skytrain), Interstate 285, and Interstate 85.

Minneapolis Convention Center: The Minneapolis Convention Center is a large convention center located in downtown Minneapolis, Minnesota.  It is located one block away from Nicollet Mall near Orchestra Hall.  The Minneapolis Convention Center has a quadruple-domed roof and because of its volume can host multiple events on the same day.  The Minneapolis Convention Center is also the largest indoor, contiguous, convention center in the Upper Midwest.

Orange County Convention Center: The Orange County Convention Center (OCCC) is the primary public convention center for the Central Florida region.  The center currently ranks as the second largest convention center in the United States (the biggest is McCormick Place in Chicago).  The OCCC offers 7000000 sqft of total space, 2100000 sqft of which is exhibit space.  The large complex is located on the south end of International Drive, a major tourist area in Orlando, Florida.  Solar panels on the roof of the South Concourse provide 1 MW of power.  On April 18, 2012, the American Institute of Architects's Florida Chapter placed the building on its list of "Florida Architecture: 100 Years.  100 Places".

Puerto Rico Convention Center: The Puerto Rico Convention Center Dr. Pedro Rosselló González" (PRCC) (or "Centro de Convenciones de Puerto Rico Dr. Pedro Rosselló González" "' in Spanish) is a convention center located in Isla Grande (recently named the Convention Center District), in San Juan, Puerto Rico owned by the Puerto Rico Convention District Authority, a government agency of Puerto Rico, and managed by AEG (property management).  Designed by tvsdesign, it is the largest convention center in the Caribbean and one of the most technologically advanced in The Americas.

Suburban Collection Showplace: Suburban Collection Showplace is a convention center and exposition center in Novi, Michigan, which forms part of Metro Detroit.  Suburban Collection Showplace is owned by TBON, LLC., a corporation located in Novi.  The center is in proximity to Interstate 96, and is about 20 mi west-northwest of Detroit.  it is the second largest convention center facility in Metro Detroit, after the Cobo Center in Downtown Detroit.  The complex hosts the Michigan State Fair and has done so since 2012.

Visalia Convention Center: The Visalia Convention Center: is a Performing Arts theater, a hotel resort, and convention facilities in Tulare County.  The center was built and founded in Visalia, California in 1972.  The center is situated at the heart of Central California and is considered one of the premier mid-state conventions in California's Central Valley.  The Visalia Convention Center was designed and built to accommodate nearly any event requirements.  The center has 114,000 square feet of meeting space and can hold up to three-thousand people.  The center is located in Downtown Visalia, at the corner of E. Acequia & Bridge.  The center sits in walking distance of 45 locally owned restaurants, shops and the convention Center also has its own resort at the convention center called the Visalia Marriott Hotel & Resort .

Baltimore Convention Center: The Baltimore Convention Center is a convention and exhibition hall located in downtown Baltimore, Maryland.  The Center is a municipal building owned and operated by the City of Baltimore.  The facility was constructed in two separate phases: the original Center, with 425,000 sqft of exhibition and meeting space, opened in August 1979 at a cost of $51.4 million.  A $151 million expansion, which increased the Center's total size to 1225000 sqft , was completed in April 1997.  The 752-room, city-owned Hilton Baltimore hotel opened in August 2008, connected to the convention center by an enclosed skywalk bridge.  Another expansion to the Baltimore Convention Center has been proposed at an estimated cost of $400 million that includes a new 500 room hotel and an 18,500 seat arena; this project is estimated to cost $900 million, this proposal is no longer active and considered dead.  As of March 2016, the State of Maryland is going to explore expanding the Baltimore Convention Center for an estimated cost of $600 million and build a new hotel attached to the expansion.  As of August 2016, the proposal of having a combined expanded convention center, arena and hotel has been revived.  Mayor Stephanie Rawlings-Blake requested a $1 million feasibility study from the Maryland Stadium Authority which was approved on August 2, 2016.

International Convention Center (Jerusalem): The International Convention Center (Hebrew: מרכז הקונגרסים הבינלאומי‎ ‎ , "Merkaz HaKongresim HaBeinLeumi"), commonly known as Binyenei HaUma (Hebrew: בנייני האומה‎ ‎ , lit.  "Buildings of the nation"), is a concert hall and convention center in Giv'at Ram in Jerusalem.  It is the largest convention center in the Middle East.

The Palazzo: The Palazzo is a luxury hotel and casino resort located on the Las Vegas Strip in Paradise, Nevada.  It is the tallest completed building in Nevada.  Designed by the Dallas based HKS, Inc., the hotel offers luxury in an Italian Renaissance ambiance.  The hotel and casino are part of a larger complex (operated as one hotel) comprising the adjoining Venetian Resort and Casino and the Sands Convention Center, all of which are owned and operated by the Las Vegas Sands Corporation.

Sands Expo: The Sands Expo and Convention Center is a large convention center.  It opened in 1990 across the street from the original Sands Hotel, was the second largest convention center in the world when it opened.

Supporting paragraphs: The Palazzo Sands Expo
Answer: 1990