Given this paragraph about video game consoles, when was the Nintendo DS released?
In 2004, Nintendo released the Nintendo DS, which featured such innovations as dual screens – one of which being a touchscreen – and wireless connectivity for multiplayer play. Throughout its lifetime, more than 154 million units were sold, making it the most successful handheld console and the second best-selling console in history. In 2005, Nintendo released the Game Boy Micro, the last system in the Game Boy line. Sales did not meet Nintendo's expectations, with 2.5 million units being sold by 2007. In mid-2005, the Nintendo World Store was inaugurated in New York City.
2004
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.
----------------
In 2004, Nintendo released the Nintendo DS, which featured such innovations as dual screens – one of which being a touchscreen – and wireless connectivity for multiplayer play. Throughout its lifetime, more than 154 million units were sold, making it the most successful handheld console and the second best-selling console in history. In 2005, Nintendo released the Game Boy Micro, the last system in the Game Boy line. Sales did not meet Nintendo's expectations, with 2.5 million units being sold by 2007. In mid-2005, the Nintendo World Store was inaugurated in New York City.
----------------
Answer the following query.
Given this paragraph about video game consoles, when was the Nintendo DS released?

user
2004
assistant