Use the following pieces of context to answer the question at the end. If the answer is not in the context, just say that you don't know.

CONTEXT:```
ChatGPT is an artificial intelligence chatbot developed by OpenAI and released in November 2022. It is built on top of OpenAI's GPT-3.5 and GPT-4 families of large language models and has been fine-tuned using both supervised and reinforcement learning techniques.
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QUESTION: What is Pinecone?
ANSWER: Provide your response in exactly 6 paragraphs (separated nearby paragraphs with 3 aterisk symbols ***).
user