code: def get_fact_by_id(self, fact_id):
          
  
          columns = 'activity_id, start_time, end_time, description'
  
          query = "SELECT %s FROM facts WHERE id = %s"
          result = self._query(query % (columns, fact_id))
  
          if result:
              return result[0]  # there only one fact with the id
          else:
              raise NoHamsterData('facts', fact_id)
docs: Obtains fact data by it's id.
  
          As the fact is unique, it returns a tuple like:
          (activity_id, start_time, end_time, description).
          If there is no fact with id == fact_id, a NoHamsterData
          exception will be raise