Question: The venue where The Heart of Gaming opened on April 29th 2017 first opened in stages between what years?

Context paragraphs:
Fate/Grand Order: Fate/Grand Order is an online free-to-play role-playing game based on the "Fate/stay night" visual novel game and franchise by Type-Moon.  The game is centered around turn-based combat where the player, who takes on the role of a "Master", summons and commands powerful familiars known as "Servants" in battle against their enemies.  The story narrative is presented in a visual novel format, and each Servant has their own personal scenario which the player explores.  It was first released on July 29, 2015 on Android, with a subsequent release on August 12 on iOS.  A Simplified Chinese version was released on July 30th 2015 on Android on September 29th 2016 on iOS in China.  A Trational Chinese version was released on October 13th 2016 in Hong Kong and Taiwan.  An English version was released on June 25th 2017 in the United States.

Whitgift Centre: The Whitgift Centre is a large shopping centre and office development in the centre of Croydon, London, opened in stages between 1968 and 1970.  The centre currently comprises 1302444 sqft of retail space and was the largest covered shopping development in Greater London until the opening of Westfield London at White City in October 2008.  The shopping centre was used in the titles of the first series of Terry & June.  Hammerson and Westfield have formed a joint venture to redevelop the shopping mall and combine it with neighbouring Centrale.

Odawa Casino Resort: Odawa Casino Resort is a Northern Michigan casino resort.  Located in Resort Township near Petoskey, Michigan, the casino opened for business on June 20, 2007.  It is owned and operated by the Little Traverse Bay Bands of Odawa Indians.  The resort replaced Victories Casino in 2007, which had served as the tribe's casino until the new resort was opened.  In addition to gaming, Odawa Casino Resort features multiple restaurants and retail outlets, a concert venue (Ovation Hall), a nightclub (The O Zone Nightclub), and a circular lounge bar in the middle of the gaming floor (Rendezvous).  The resort also includes a AAA Diamond rated Hotel.  Full shuttle transportation is available to all resort guests.  Odawa Casino Resort is open to guests of all ages, however, the casino's gaming floor and the O Zone Nightclub are restricted to those of age 21 and older.  Starting in 2011, the minimum gaming age at Odawa Casino Resort has been approved to be lowered to 19 years old.

The Heart of Gaming: The Heart of Gaming is an amusement arcade in London.  The arcade's current venue opened on April 29th 2017 in the Whitgift Centre of Croydon.  It is one of the few remaining video game arcades in London.

181st Battalion (Brandon), CEF: The 181st Battalion (Brandon), CEF was a unit in the Canadian Expeditionary Force during the First World War.  Based in Brandon, Manitoba, the unit began recruiting during the winter of 1915, 1916 & 1917 in that city and the surrounding district.  The 181st CEF Battalion embarked on the H.M.T Grampian in Halifax on the 16th of April, 1917.  After sailing to England in Liverpool on April 29th 1917, the battalion was absorbed into the 18th Reserve Battalion on April 29, 1917 and stationed in Dibgate Camp, Shorncliffe, England.  The 181st Battalion, CEF had one Officer Commanding: Lieut-Col.  David Wilson Beaubier.

29th station: 29th was a station on the Chicago Transit Authority's South Side Main Line, which is now part of the Green Line.  The station was located at 29th Street and Wabash Avenue in the Douglas neighborhood of Chicago.  29th was situated south of 26th and north of 31st.  29th opened on June 6, 1892, and closed on August 1, 1949.

2017 First Data 500: The 2017 First Data 500 is a Monster Energy NASCAR Cup Series race to be held on October 29, 2017, at Martinsville Speedway in Ridgeway, Virginia.  Contested over 500 laps on the .526 mile (.847 km) short track, it was the 33rd race of the 2017 Monster Energy NASCAR Cup Series season, seventh race of the Playoffs, and first race of the Round of 8.

29th AVN Awards: The 29th AVN Awards ceremony, presented by "Adult Video News", honored the best pornographic movies and adult entertainment products of 2011 of the United States and took place January 21, 2012, at a new venue, The Joint inside the Hard Rock Hotel and Casino in Paradise, Nevada.  Movies or products released between Oct. 1, 2010 and Sept. 30, 2011 were eligible.  The ceremony was televised in the United States by Showtime.  Comedian Dave Attell hosted the show for the second time.  He first presided over the 27th ceremony held in 2010, and shared the 29th ceremony with co-hosts Bree Olson and Sunny Leone.  The awards show was held together with the Adult Entertainment Expo and Internext at the same venue.

Batavierenrace: The Batavierenrace is a student relay race organized in the Netherlands each year in April.  It is a 185 km running race starting off at the Radboud University Nijmegen in Nijmegen and it takes the up to 8500 participants in 25 stages (17 men's stages and 8 women's stages) through Germany to the campus of the University of Twente in Enschede.  It was listed in 2012, in the Guinness World Records as the relay race with the highest number of participants (8,509).  On April 29, 2017 the 45th Batavierenrace will take place.

The Hope and Anchor, Islington: The Hope and Anchor is a pub on Upper Street, in the London Borough of Islington, and first opened its doors in 1880.  During the mid-1970s it was one of the first pubs to embrace the emergent, but brief, phenomenon of pub rock.  With the decline of this movement, the pub went on to become a leading venue in the punk rock movement.  The Hope and Anchor is still an operational pub and live music venue today, owned and operated by the Greene King brewing company.  Venue facilities have been improved via refurbishments over the years.

Supporting paragraphs: The Heart of Gaming Whitgift Centre
Answer: 1968 and 1970