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": "seasonendconstructorstanding", "description": "Fetches the Constructor Standings at the end of the specified Formula 1 season.", "parameters": {"year": {"description": "The year for which to fetch the constructor standings.", "type": "str", "default": "year"}}}]
Fetch the constructor standings for the 2000 Formula 1 season.
user
assistant
[{"name": "seasonendconstructorstanding", "arguments": {"year": "2000"}}]