class BaseExtractor:
    def extract(self):
        raise NotImplementedError("This method should be overridden by subclasses.")

    def load_rules(self, rules):
        raise NotImplementedError("This method should be overridden by subclasses.")


class RuleExtractor(BaseExtractor):
    def __init__(self, config_file):
        self.config_file = config_file
        self.rules = self.load_rules_from_file()

    def load_rules_from_file(self):
        import json
        with open(self.config_file, 'r') as file:
            return json.load(file)

    def extract(self):
        # Implement rule extraction logic here
        extracted_rules = []
        for rule in self.rules:
            extracted_rules.append(rule)  # Placeholder for actual extraction logic
        return extracted_rules