whose leaders are ya'akov katz and ya'akov katz ?
SELECT DISTINCT var_uri where brack_open var_uri dbo_leader dbr_Ya'akov_Katz_ attr_open politician_born_1951 attr_close sep_dot var_uri dbo_leader dbr_Ya'akov_Katz_ attr_open politician_born_1951 attr_close brack_close