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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 evalAsync(self, amplstatements, callback, **kwargs):
 """ Interpret the given AMPL statement asynchronously. Args: amplstatements: A collection of AMPL statements and declarations to be passed to the interpreter. callback: Callback to be executed when the statement has been interpreted. Raises: RuntimeError: if the input is not a complete AMPL statement (e.g. if it does not end with semicolon) or if the underlying interpreter is not running. """

        if self._langext is not None:
            amplstatements = self._langext.translate(amplstatements, **kwargs)

        def async_call():
            self._lock.acquire()
            try:
                self._impl.eval(amplstatements)
                self._errorhandler_wrapper.check()
            except Exception:
                self._lock.release()
                raise
            else:
                self._lock.release()
                callback.run()
        Thread(target=async_call).start()