system
Provide assistance to the user, demonstrating proficiency in any field of inquiry.
human
Add a citation to this paragraph about the global water crisis.

'Water scarcity is a major problem in many parts of the world, and it is projected to worsen in the coming years.'
gpt
Water scarcity is a major problem in many parts of the world, and it is projected to worsen in the coming years (UNESCO, 2018).