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_palindromic_substring", "description": "Finds the longest palindromic substring in a string.", "parameters": {"s": {"description": "The input string.", "type": "str"}}}]
What is the longest palindromic substring in the sentence 'Was it a car or a cat I saw?'.
user
assistant
[{"name": "find_longest_palindromic_substring", "arguments": {"s": "Was it a car or a cat I saw?"}}]