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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 extract(self, text: str) -> List[Extraction]: """ Splits text by sentences. Args: text (str):
 Input text to be extracted. Returns: List[Extraction]: the list of extraction or the empty list if there are no matches. """


        doc = self._parser(text)

        extractions = list()
        for sent in doc.sents:
            this_extraction = Extraction(value=sent.text,
                                         extractor_name=self.name,
                                         start_token=sent[0],
                                         end_token=sent[-1],
                                         start_char=sent.text[0],
                                         end_char=sent.text[-1])
            extractions.append(this_extraction)

        return extractions