Question: Where is the headquarters of the flag airline of Bangledesh that has resumed weekly flights after nine years providing international passenger and cargo services?
Context: Cayman Airways is the flag carrier airline of the British Overseas Territory of the Cayman Islands.  With its head office in Grand Cayman, it operates mainly as an international and domestic scheduled passenger carrier, with cargo services available on all routes.  Its operations are based at Owen Roberts International Airport (GCM) in George Town, Grand Cayman.  The airline also offers a limited charter service with a recent example being flights to and from Los Angeles.  Cayman Airways' slogan is "Those who fly us love us". China Airlines (CAL) () () is the flag carrier and largest airline of the Republic of China (Taiwan).  It is headquartered in Taoyuan International Airport and has 12,607 regular employees.  China Airlines operates over 1,400 flights weekly to 118 airports in 115 cities (including codeshare) across Asia, Europe, North America and Oceania.  The cargo division operates 91 pure freighter flights weekly.  The carrier was, in 2013, the 29th and 10th largest airline in the world in terms of passenger revenue per kilometer (RPK) and freight RPK, respectively.  China Airlines has three airline subsidiaries: Mandarin Airlines operates flights to domestic and low-demand regional destinations; China Airlines Cargo, a member of Skyteam Cargo, operates a fleet of freighter aircraft and manages its parent airline's cargo-hold capacity; Tigerair Taiwan is a low-cost carrier established by China Airlines and Singaporean airline group Tigerair Holdings and is wholly owned by China Airlines Group. Barisal Airport (IATA: BZL, ICAO: VGBR) is a domestic airport located in the southern city of Barisal in Bangladesh.  GMG Airlines, Royal Bengal Airlines and United Airways previously operated flights to Dhaka from this airport.  In April 2015, the national carrier Biman Bangladesh Airlines resumed weekly flights after nine years. Ukraine International Airlines (UIA), PJSC (Ukrainian: Приватне акціонерне товариство «Авіакомпанія Міжнародні Авіалінії України» (МАУ), "Aviakompaniya Mizhnarodni Avialiniyi Ukrayiny", ] ) is the flag carrier and the largest airline of Ukraine, with its head office in Kiev with its main hub at Boryspil International Airport outside of Kiev.  It operates domestic and international passenger flights and cargo services to Europe, the Middle East, the United States and Asia. Midex Airlines was a cargo airline based in the United Arab Emirates.  Licensed for both cargo and passenger services in 2007, the airline concentrates on scheduled cargo services.  Passenger service never started.  Scheduled cargo service has been operated from Al Ain to Paris ORY for few months and subsequently closed due to lack of freight. Rail transport in the Czech Republic carried 162.906 million passengers and 68.37 million tonnes of cargo in the year 2009.  The majority of passenger services run nowadays are operated by the state company České dráhy (Czech Railways), which until 2007 also managed cargo services now run by ČD Cargo.  In 2009 the country had 9,420 km of standard gauge track, 3,153 km of which is electrified.  The network has same gauge links to all four countries bordering the Czech Republic (Slovakia, Austria, Germany and Poland) with passenger services to all four countries in operation.  Major hubs for international passenger services on the network are in Prague, Ostrava, Brno and Břeclav, and the busiest station (by number of passengers) is Praha hlavní nádraží. Turkmenistan Airlines (Turkmen: Türkmenhowaýollary ) is the flag carrier airline of Turkmenistan, headquartered in Ashgabat.  It operates domestic and international passenger and cargo services mainly from its hub at Ashgabat International Airport. Biman Bangladesh Airlines (Bengali: বিমান বাংলাদেশ এয়ারলাইন্স ), partly transcribed from English into Bengali and the other way around, commonly known as Biman (Bengali: বিমান ), is the flag carrier of Bangladesh.  Its main hub is at Shahjalal International Airport in Dhaka and it also operates flights from its secondary hubs at Shah Amanat International Airport in Chittagong and Osmani International Airport in Sylhet.  The airline provides international passenger and cargo services to its destinations; as of 2015 , it has air service agreements with 42 countries, but flies to just 16 of them.  The airline's headquarters, "Balaka Bhaban", is located in Kurmitola, Dhaka.  Annual Hajj flights; transporting tourists and non-resident Bangladeshi workers and migrants; and the activities of its subsidiaries form an integral part of the airline's business.  The carrier is currently facing stiff competition from a number of domestic Bangladeshi private airlines as well as some international carriers, which offer greater flexibility targeting Bangladesh's air transport sector which is experiencing an 8% annual growth rate, thanks to a large number of tourists and non-resident Bangladeshi travellers. Rossair Executive Air Charter was an airline based in Lanseria, South Africa, operating chartered domestic and international passenger and cargo services, aiming at corporate and leisure markets.  The airline was founded in 1956, and was shut down in 2005. Iran Air, branded as The Airline of the Islamic Republic of Iran (Persian: هواپیمايی جمهوری اسلامی ایران‎ ‎ "Havâpeymâyiye Jomhuriye Eslâmiye Irân"), is the national flag carrier airline of Iran headquartered on the grounds of Mehrabad Airport in Tehran.  Tehran-Imam Khomeini and Tehran-Mehrabad are its main bases for international and domestic flights.  As of August 2017, it operates scheduled services to 59 destinations in Asia and Europe.  The airline has a subsidiary for cargo services, called Iran Air Cargo, that operates scheduled and charter services.
Answer: Kurmitola, Dhaka