<prompt> unaweza kugeuza matini haya ya swahilikwa kiingereza?mwezi huu mjumbe maalum wa umoja wa mataifa kwa ajili ya yemen anayemaliza muda wake martin griffiths ameliambia baraza la usalama kuwa juhudi zake binafsi katika kipindi cha miaka mitatu kumaliza vita hazikufanikiwa.  <response>: this month the outgoing u.n. envoy for yemen martin griffiths told the security council his own efforts over the past three years to end the war had been in vain. 