This is possible?
(Timestamp('2007-01-03 00:00:00+0000', tz='UTC'), Equity(8098, symbol=u'WM', asset_name=u'WASHINGTON MUTUAL INC', exchange=u'NYSE', start_date=Timestamp('2002-01-01 00:00:00+0000', tz='UTC'), end_date=Timestamp('2008-09-26 00:00:00+0000', tz='UTC'), first_traded=None, auto_close_date=Timestamp('2008-10-01 00:00:00+0000', tz='UTC'), exchange_full=u'NEW YORK STOCK EXCHANGE'))
(Timestamp('2007-01-03 00:00:00+0000', tz='UTC'), Equity(19181, symbol=u'WM', asset_name=u'WASTE MANAGEMENT INC(NEW)', exchange=u'NYSE', start_date=Timestamp('2002-01-01 00:00:00+0000', tz='UTC'), end_date=Timestamp('2016-11-07 00:00:00+0000', tz='UTC'), first_traded=None, auto_close_date=Timestamp('2016-11-10 00:00:00+0000', tz='UTC'), exchange_full=u'NEW YORK STOCK EXCHANGE'))