<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def drop(self):
 """ Drop the database. """

        Statement = self.get_model('statement')
        Tag = self.get_model('tag')

        session = self.Session()

        session.query(Statement).delete()
        session.query(Tag).delete()

        session.commit()
        session.close()