instruction:
In this task the focus is on physical knowledge about the world. Given the provided goal task in the input, describe a process that would lead to the asked outcome. This process often involves physical motions with objects, such as moving them, arranging them in a certain way, mixing them, shaking them, etc. 
question:
Clean a bike chain
answer:
Brush each link with a firm brush or a toothbrush.


question:
How do you decide what type of fish to keep in an aquarium?
answer:
To decide what type of fish is best for your aquarium, first consider the size a species of fish will be full grown, and make sure you can safely accommodate it. Then consider things like water chemistry requirements, aggression level, tankmates and dietary needs.


question:
To clean the litter box of your cat.
answer:

Take a pooper scooper and scoop out the pieces of poop. Put them in the trash.