class GaiaAgent:
    """
    A basic agent that receives a question and returns a fixed answer.

    This class serves as a placeholder or a simple baseline agent for testing
    and demonstration purposes. It does not perform any sophisticated
    reasoning or information retrieval.
    """

    def __init__(self):
        """
        Initializes the GaiaAgent.

        Currently, this constructor simply prints a message to the console.
        In a more complex implementation, this method might load a model,
        connect to a database, or perform other setup tasks.
        """
        print("BasicAgent initialized.")

    def __call__(self, question: str) -> str:
        """
        Processes a question and returns a fixed answer.

        Args:
            question: The question to be processed.

        Returns:
            A fixed string representing the agent's 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