which program was on oprah winfrey network network with executive producer as oprah winfrey ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_network dbr_Oprah_Winfrey_Network_ attr_open U.S._TV_channel attr_close sep_dot var_uri dbo_executiveProducer dbr_Oprah_Winfrey sep_dot var_uri a dbo_TelevisionShow brack_close