messages.content: Who was the U.S. president during the Civil War?
messages.role: user
messages.role: assistant
messages.arguments: {"event": "Civil War", "country": "USA"}
messages.name: US_President_During_Event
messages.type: function
tools: [{"type": "function", "function": {"name": "US_President_During_Event", "description": "Returns the U.S. president during a specified historical event.", "parameters": {"type": "dict", "properties": {"event": {"type": "string", "description": "The historical event."}, "country": {"type": "string", "description": "The country the president leads (optional parameter, defaults to 'USA' if not specified)."}}, "required": ["event"]}}}]