Input (grade 10): In 1993, PLO chairman Yasser Arafat recognized the State of Israel in an official letter to its prime minister, Yitzhak Rabin.
Output (grade 5): The leader of the PLO used to be Yasser Arafat. He signed a series of Peace Treaties called the Oslo Accords with Yitzhak Rabin who the Prime Minister of Israel at the time.