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?

<P0-S0> Barisal Airport (IATA: BZL, ICAO: VGBR) is a domestic airport located in the southern city of Barisal in Bangladesh. <P0-S1>  GMG Airlines, Royal Bengal Airlines and United Airways previously operated flights to Dhaka from this airport. <P0-S2>  In April 2015, the national carrier Biman Bangladesh Airlines resumed weekly flights after nine years. <SEP> <P1-S0> 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. <P1-S1>  Tehran-Imam Khomeini and Tehran-Mehrabad are its main bases for international and domestic flights. <P1-S2>  As of August 2017, it operates scheduled services to 59 destinations in Asia and Europe. <P1-S3>  The airline has a subsidiary for cargo services, called Iran Air Cargo, that operates scheduled and charter services. <SEP> <P2-S0> China Airlines (CAL) () () is the flag carrier and largest airline of the Republic of China (Taiwan). <P2-S1>  It is headquartered in Taoyuan International Airport and has 12,607 regular employees. <P2-S2>  China Airlines operates over 1,400 flights weekly to 118 airports in 115 cities (including codeshare) across Asia, Europe, North America and Oceania. <P2-S3>  The cargo division operates 91 pure freighter flights weekly. <P2-S4>  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. <P2-S5>  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. <SEP> <P3-S0>  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. <P3-S1> 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. <P3-S2>  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. <P3-S3>  The airline's headquarters, "Balaka Bhaban", is located in Kurmitola, Dhaka. <P3-S4>  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. <P3-S5>  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.