give me some shows owned by oprah winfrey network and discovery health channel ?
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_network dbr_Discovery_Health_Channel sep_dot var_uri a dbo_TelevisionShow brack_close