class BasicAgent:
    """
    A simple agent that returns a fixed answer for any question.
    """
    def __init__(self):
        print("BasicAgent initialized.")

    def __call__(self, question: str) -> str:
        """
        Processes the question and returns a fixed answer.
        """
        print(f"Agent received question (first 50 chars): {question[:50]}...")
        fixed_answer = "This is a default answer."
        print(f"Agent returning fixed answer: {fixed_answer}")
        return fixed_answer