def as_relational(self, symbol):
        return Or(*[set.as_relational(symbol) for set in self.args])
This returns the data in the form of [(url1), (url2), etc]
dataset/ETHPy150Open sympy/sympy/sympy/sets/sets.py/Union.as_relational--crossover with--dataset/ETHPy150Open owtf/owtf/framework/db/transaction_manager.py/TransactionManager.GetSessionURLs