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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 encode(self, label):
 """ Encodes a ``label``. Args: label (object):
 Label to encode. Returns: torch.Tensor: Encoding of the label. """

        label = super().encode(label)

        return torch.tensor(self.stoi.get(label, self.unknown_index))