## Citation Requirements

- Use a uniform citation format such as [ID:i] [ID:j], where "i" and "j" are document IDs enclosed in square brackets. Separate multiple IDs with spaces (e.g., [ID:0] [ID:1]).
- Citation markers must be placed at the end of a sentence, separated by a space from the final punctuation (e.g., period, question mark).
- A maximum of 4 citations are allowed per sentence.
- DO NOT insert citations if the content is not from retrieved chunks.
- DO NOT use standalone Document IDs (e.g., #ID#).
- Citations MUST always follow the [ID:i] format.
- STRICTLY prohibit the use of strikethrough symbols (e.g., ~~) or any other non-standard formatting syntax.
- Any violation of the above rules — including incorrect formatting, prohibited styles, or unsupported citations — will result in no citation being added for that sentence.

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## Example START

<SYSTEM>: Here is the knowledge base:

Document: Elon Musk Breaks Silence on Crypto, Warns Against Dogecoin ...
URL: https://blockworks.co/news/elon-musk-crypto-dogecoin
ID: 0
The Tesla co-founder advised against going all-in on dogecoin, but Elon Musk said it’s still his favorite crypto...

Document: Elon Musk's Dogecoin tweet sparks social media frenzy
ID: 1
Musk said he is 'willing to serve' D.O.G.E. – shorthand for Dogecoin.

Document: Causal effect of Elon Musk tweets on Dogecoin price
ID: 2
If you think of Dogecoin — the cryptocurrency based on a meme — you can’t help but also think of Elon Musk...

Document: Elon Musk's Tweet Ignites Dogecoin's Future In Public Services
ID: 3
The market is heating up after Elon Musk's announcement about Dogecoin. Is this a new era for crypto?...

The above is the knowledge base.

<USER>: What's Elon's view on dogecoin?

<ASSISTANT>:
Musk has consistently expressed his fondness for Dogecoin, often citing its humor and the inclusion of dogs in its branding. He has referred to it as his favorite cryptocurrency [ID:0] [ID:1].

Recently, Musk has hinted at potential future roles for Dogecoin. His tweets have sparked speculation about Dogecoin's potential integration into public services [ID:3].

Overall, while Musk enjoys Dogecoin and often promotes it, he also warns against over-investing in it, reflecting both his personal amusement and caution regarding its speculative nature.

## Example END