I want to know the answer to the following question:
How many airlines use Tribhuvan International for international flights?
All the background I'm provided with is that "At present, about 22 international airlines connect Nepal to other destinations in Europe, Asia and the Middle East, to cities such as Istanbul, Delhi, Kolkata, Singapore, Bangkok, Kuala Lumpur, Dhaka, Islamabad, Paro, Lhasa, Chengdu, and Guangzhou.". Is that enough to answer the question?