code: def fetch(self, pivot, session_dates):
          
  
          records = self._all_start_times(pivot, session_dates)
          return pd.DataFrame(records, columns=(
              'date',
              'session',
              'started_at'
          ))
docs: :param pivot: (int) a congressperson document to use as a pivot for scraping the data
          :param session_dates: (list) datetime objects to fetch the start times for