<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def execute(self, eopatch):
 """ Execute predicate on input eopatch :param eopatch: Input `eopatch` instance :return: The same `eopatch` instance with a `mask.valid_data` array computed according to the predicate """

        feature_type, feature_name = next(self.valid_data_feature())
        eopatch[feature_type][feature_name] = self.predicate(eopatch)
        return eopatch