@retry(stop=stop_after_attempt(3), wait=wait_exponential(multiplier=1, min=4, max=10))
def get_node_definitions(chain, structure: str, example: Dict) -> Dict[str, Dict[str, str]]:
    """Get node definitions with retry logic"""
    try:
        # Get response from LLM
        response = chain.invoke({"structure": structure, "example": example})

        # Parse response
        node_defs = ast.literal_eval(response)

        # Validate structure
        if not validate_node_definition(node_defs):
            raise ValueError("Invalid node definition structure")

        return node_defs