user: What is a protractor?

assistant: A protractor is a mathematical instrument/device that can be used to help calculate the angle

user: Will immunity increase when you have pets like Dogs/Cats?

assistant: Mostly yes! immunity increases of humans with pets excluding the people with pet dander allergy. Thoughts to ponder for growing up kids who are exposed to pets build a higher level of immunity and resilience. Added to the unconditional LOVE the pet offers.

user: Given a reference text about Lasantha Rodrigo, tell me how long he worked as a mechanical engineer and who worked for.

assistant: Lasantha Rodrigo worked as a mechanical engineer for Ceylon Cold Stores for 31 years.