In the context of the input sentence, determine the relationship between 'AirAsia' and 'Kuala Lumpur'.
Options: distribution format, chief executive officer, location of formation, product/material produced

The AirAsia group is using Bali as a hub, meaning travellers can also fly on from there to other destinations like Jakarta, Bangkok, Singapore and Kuala Lumpur if they want a longer Asian holiday.
location of formation