query: What is the capital of Nepal?
passage: Kathmandu
Kathmandu (/ˌkætmænˈduː/;[2] Nepali: काठमाडौं, Nepal Bhasa: य़े: Yei, Nepali pronunciation: [kaʈʰmaɳɖu]) is the capital city and largest city of Nepal with a population of 1.5 million in the city proper, and 3 million in its wider urban agglomeration across the Kathmandu Valley, which includes the towns of Lalitpur, Kirtipur, Madhyapur Thimi, Bhaktapur making the total population roughly 2.5 million people and the municipalities across Kathmandu valley. Kathmandu is also the largest metropolis in the Himalayan hill region. Nepali is the most spoken language in the city, while English is widely understood.
passage: List of airports in Nepal
The country's only international airport and the hub of all air service in the country is Tribhuvan International Airport, which serves the nation's capital and the country's largest metropolitan city of Kathmandu. However, two domestic airports - Pokhara International Airport and Gautam Buddha International Airport - are being constructed and converted into the second and third international airport of Nepal. Both the constructions are scheduled to finish within upcoming five years.