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": "find_longest_word", "description": "Finds the longest word in a list of words.", "parameters": {"words": {"description": "A list of words.", "type": "List[str]"}}}, {"name": "is_valid_parentheses", "description": "Checks if a string contains valid parentheses.", "parameters": {"s": {"description": "The input string.", "type": "str"}}}, {"name": "calculate_grade", "description": "Calculates the weighted average grade based on scores and their corresponding weights.", "parameters": {"scores": {"description": "A list of scores.", "type": "List[float]"}, "weights": {"description": "A list of weights corresponding to each score.", "type": "List[float]"}}}]
Find the longest word in the list ['apple', 'banana', 'cherry', 'date', 'elderberry'].
user
assistant
[{"name": "find_longest_word", "arguments": {"words": ["apple", "banana", "cherry", "date", "elderberry"]}}]