user: What is the distance from the Earth to its moon?

assistant: The average distance to the moon is 382,500 kilometers.  The distance varies because the moon travels around Earth in a elliptical orbit.  At perigee, the point at which the moon is closest to Earth, the distance is approximately 360,000 kilometers.

user: How old was Stefan Richarz when he received his phD?

assistant: Stefan was 45 years old in 1919 when he received his phD from University of Munich, given he was born in 1874.

user: What is caramelization?

assistant: Caramelization is a chemical process that happens to carbohydrates and sugars when they are heated to certain temperatures. At these temperatures new compounds are formed and browning happens. For example during caramelization, complex sugars degrade to simple sugars. Caramelization is an important process in cooking and shows ups in many common recipes