Question: What is the tallest structure in the country where Wadyan is located?

full_context: Document 1: Economy of Bahrain: Bahrain has an open economy. The Bahraini currency is the second-highest-valued currency unit in the world. Since the late 20th century, Bahrain has heavily invested in the banking and tourism sectors. The country's capital, Manama is home to many large financial structures. Bahrain's finance industry is very successful. In 2008, Bahrain was named the world's fastest growing financial center by the City of London's Global Financial Centres Index. Bahrain's banking and financial services sector, particularly Islamic banking, have benefited from the regional boom driven by demand for oil. Petroleum production is Bahrain's most exported product, accounting for 60% of export receipts, 70% of government revenues, and 11% of GDP. Aluminium production is the second most exported product, followed by finance and construction materials.
Document 2: Marina One: Designed by Christoph Ingenhoven, Marina One covers a total gross floor area of approximately 3.67 million square feet. The development will include two 34-storey residential towers, two 30-storey prime grade A office towers and a retail podium, The Heart, which will feature lush greenery and landscaping by Gustafson Porter and ICN Design. Both were landscape architects behind Singapore's Gardens by the Bay in Marina South.
Document 3: Wadyan: Wadyan (Arabic: واديان) is a village in the island of Sitra, Bahrain. A branch of the National Bank of Bahrain and the Sitra police station are located in Wadyan.
Document 4: Barbar, Bahrain: Barbar () is a village in the north of Bahrain. It lies between Diraz and Jannusan. The Dilmun era Barbar Temple is located near the village.
Document 5: World Port Center: World Port Centre is a 33-storey, skyscraper in Rotterdam, Netherlands. The tower was commissioned by ING Real Estate Development. The building costs amounted to approximately NLG100 million. The Port of Rotterdam Authority is the main occupant of the WPC, using floors 2 to 19. Floors 25 to 28 are rented to Eneco Energie, floors 29 to 32 are built as conference areas and are commercially leased to Regus. The grounds also cover the Argentine steak-restaurant Gaucho's.
Document 6: Bahrain World Trade Center: The Bahrain World Trade Center (also called Bahrain WTC or BWTC) is a 240-metre-high (787 ft), 50-floor, twin tower complex located in Manama, Bahrain. Designed by the multi-national architectural firm Atkins, construction on the towers was completed in 2008. It is the first skyscraper in the world to integrate wind turbines into its design. The wind turbines were developed, built and installed by the Danish company Norwin A/S.The structure is constructed close to the King Faisal Highway, near popular landmarks such as the towers of Bahrain Financial Harbour (BFH), NBB and Abraj Al Lulu. It currently ranks as the second-tallest building in Bahrain, after the twin towers of the Bahrain Financial Harbour. The project has received several awards for sustainability, including:
Document 7: Nuwaidrat: Nuwaidrat (Arabic: النويدرات) is a village located in Bahrain, close to Sitra; it was formerly part of the Sitra Municipality.
Document 8: Burj Khalifa: The Burj Khalifa (Arabic: برج خليفة ‎, Arabic for ``Khalifa Tower ''; pronounced English: / ˈbɜːrdʒ kəˈliːfə /), known as the Burj Dubai before its inauguration in 2010, is a skyscraper in Dubai, United Arab Emirates. With a total height of 829.8 m (2,722 ft) and a roof height (excluding antenna) of 828 m (2,717 ft), the Burj Khalifa has been the tallest structure in the world since its topping out in late 2008.
Document 9: Grattacielo Intesa Sanpaolo: Renzo Piano, Grattacielo Intesa Sanpaolo's architect, described the skyscraper as "bioclimatic building", being naturally ventilated and cooled; with a substantial amount of its power requirement to be generated from photovoltaic panels that cover the southern façade. It was awarded the LEED Platinum rating, making it the only high-rise building in Europe to hold such a certification.
Document 10: Janabiyah: Janabiyah (Arabic:الجنبية) is a village situated in the north-west of Bahrain, close to the Gulf of Bahrain. It is located south of Bani Jamra and to the west of the village of Saar. It is under the Northern Governorate administrative region of the country. The village is mainly popular for its camel farms that host around 100 camels.
Document 11: Malkiya, Bahrain: Malkiya () is a coastal village that lies on the western coast of Bahrain Island in Bahrain. The village is home to the Malkiya Club football team.
Document 12: Umm as Sabaan: Umm as Sabaan () is an islet in Bahrain. It lies off the north western corner of Bahrain Island, near Budaiya village, and east of Jidda Island, located in Persian Gulf. It lies west of the capital, Manama, on Bahrain Island.
Document 13: Sadad, Bahrain: Sadad is a coastal village situated on the western shore of Bahrain. It is situated to the south of Malkiya and to the west of Hamad Town, in the Northern Governorate administrative region of the country.
Document 14: Dynamic Tower: The Dynamic Tower (also known as Dynamic Architecture Building or the Da Vinci Tower) is a proposed , 80-floor moving skyscraper, designed by architect David Fisher.
Document 15: Gate of Europe: The Gate of Europe towers were designed by the American architects Philip Johnson and John Burgee, built by Fomento de Construcciones y Contratas and commissioned by the Kuwait Investment Office (hence their initial name ""Torres KIO"" or "KIO Towers"). Leslie E. Robertson Associates, RLLP New York (LERA) provided structural engineering services. Each building is 115 m tall with an inclination of 15°, making them the first inclined skyscrapers in the world. They are located near the Chamartín railway station, on the sides of the "Plaza de Castilla" bus station, north from the "Paseo de la Castellana" and near the Cuatro Torres Business Area (CTBA).
ground_truth: the twin towers of the Bahrain Financial Harbour
sub_queries: Wadyan >> country Answer: Bahrain
what is the tallest structure in Bahrain ? Answer: the twin towers of the Bahrain Financial Harbour