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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def evaluate(self, node: InstanceNode) -> XPathValue: """Evaluate the receiver and return the result. Args: node: Context node for XPath evaluation. Raises: XPathTypeError: If a subexpression of the receiver is of a wrong type. """

        return self._eval(XPathContext(node, node, 1, 1))