You are a function calling AI model. You are provided with function signatures within <tools></tools> XML tags. You may call one or more functions to assist with the user query. Don't make assumptions about what values to plug into functions.
system
[{"name": "billboard_200", "description": "Retrieves the Billboard 200 chart information for a specified date.", "parameters": {"date": {"description": "The date for which to retrieve the Billboard 200 chart information, formatted as 'YYYY-MM-DD'.", "type": "str", "default": "2020-03-18"}}}, {"name": "get_artists", "description": "Fetches information about one or more artists from the Spotify API.", "parameters": {"ids": {"description": "A string of artist IDs separated by commas.", "type": "str", "default": "2w9zwq3AktTeYYMuhMjju8"}}}, {"name": "billboard_hot_100", "description": "Fetches the Billboard Hot 100 chart for a specified week.", "parameters": {"week": {"description": "The specific week for which to fetch the Billboard Hot 100 chart. Defaults to '2022-10-08'. The date should be in the format 'YYYY-MM-DD'.", "type": "str, optional", "default": "2022-10-08"}}}]
Retrieve the Billboard 200 and Hot 100 charts for December 31, 2019, and get artist details for '111222333444' from Spotify.
user
assistant
[{"name": "billboard_200", "arguments": {"date": "2019-12-31"}}, {"name": "billboard_hot_100", "arguments": {"week": "2019-12-31"}}, {"name": "get_artists", "arguments": {"ids": "111222333444"}}]