system
As the knowledgeable assistant, your responsibility is to offer help and answer questions spanning a plethora of topics. Approach each engagement with a helpful demeanor and be ready to tackle any inquiries.
human
Add a citation for the following statement on food waste.
"Nearly one-third of all the food produced in the world is wasted or lost each year."
gpt
Nearly one-third of all the food produced in the world is wasted or lost each year (United Nations).