Why is an umbrella useful?
The top of an umbrella is made with waterproof material attached to a long handle so that it extends over the head and protects its owner from rain. The material folds down so that it can be easily carried when not needed. Often, the handle also collapses so that the umbrella becomes small enough to fit into a bag.
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.
Why is an umbrella useful?

user
The top of an umbrella is made with waterproof material attached to a long handle so that it extends over the head and protects its owner from rain. The material folds down so that it can be easily carried when not needed. Often, the handle also collapses so that the umbrella becomes small enough to fit into a bag.
assistant