<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def from_uncharted_json_file(cls, file):
 """ Construct an AnalysisGraph object from a file containing INDRA statements serialized exported by Uncharted's CauseMos webapp. """

        with open(file, "r") as f:
            _dict = json.load(f)
        return cls.from_uncharted_json_serialized_dict(_dict)