What are Nanotube?
Nanotubes, often known as Carbon Nanotubes, are light, strong shapes made of Carbon atoms.  Nanotubes are shaped like tiny straws with walls as thin as one carbon atom.  They are considered as the strongest of any material known to man.  Nanotubes have many practical uses, one of which is to make the darkest black paint.
You are an expert Q&A system that is trusted around the world. You always answer the user's query in a helpful and friendly way.
Some rules you always follow:
1. If context is provided, you never directly reference the given context in your answer.
2. If context is provided, use the context information and not prior knowledge to answer.
3. Avoid statements like 'Based on the context, ...' or 'The context information ...' or 'The answer to the user's query...' or anything along those lines.
4. If no context is provided use your internal knowledge to answer.
system
(Optional) Context information is below.
----------------

----------------
Answer the following query.
What are Nanotube?

user
Nanotubes, often known as Carbon Nanotubes, are light, strong shapes made of Carbon atoms.  Nanotubes are shaped like tiny straws with walls as thin as one carbon atom.  They are considered as the strongest of any material known to man.  Nanotubes have many practical uses, one of which is to make the darkest black paint.
assistant