Question: why did jean valjean take care of cosette
[{'answer': 'he had promised', 'provenance': [{'wikipedia_id': '61492', 'title': 'Jean Valjean', 'start_paragraph_id': 21, 'start_character': 238, 'end_paragraph_id': 21, 'end_character': 253, 'bleu_score': 1.0, 'section': 'Section::::In the novel.:Part Two: Cosette.\n'}]}, {'provenance': [{'wikipedia_id': '61492', 'title': 'Jean Valjean', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6804991163238837753}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '61492', 'title': 'Jean Valjean', 'start_paragraph_id': 21, 'start_character': 0, 'end_paragraph_id': 21, 'end_character': 1060, 'bleu_score': 0.9567198216876721, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6804991163238837753}, 'section': 'Section::::In the novel.:Part Two: Cosette.\n'}]}, {'provenance': [{'wikipedia_id': '61492', 'title': 'Jean Valjean', 'section': 'Section::::In the novel.:Part Two: Cosette.\n', 'start_paragraph_id': 21, 'end_paragraph_id': 21, 'meta': {'evidence_span': ["A short chapter, mainly consisting of two newspaper articles, informs the reader, that Jean Valjean has been re-arrested while getting into the stagecoach to Montfermeil (on his way to get Fantine's eight-year-old daughter, Cosette, whom he had promised to rescue). In July 1823, he was condemned to death for the 40-sous theft and the escape from the jail in Montreuil-sur-Mer, as the prosecutor claims that Valjean was part of a gang of street robbers and the latter refuses to defend himself. His sentence was graciously reduced by the king to only life in prison instead of death. Before he was captured, Jean Valjean had already traveled near to Montfermeil and buried all the money he'd saved as M. Madeleinea chapter tells of a worker in Montfermeil, a former Toulon convict, who claims having seen, according to a local fairy tale, the devil burying his treasure in the forest. No further explanation is ever given as to why, having buried his money near Montfermeil, Valjean had traveled back to Paris and then attempted to travel back to Montfermeil.", 'he had promised']}}]}]