generate questions: An Ancient Chinese document from the 9th century referred to the northern Somali coast — which was then called "Berbera" by Arab geographers in reference to the region's "Berber" (Cushitic) inhabitants — as Po-pa-li. The first clear written reference of the sobriquet Somali, however, dates back to the 15th century. During the wars between the Sultanate of Ifat based at Zeila and the Solomonic Dynasty, the Abyssinian Emperor had one of his court officials compose a hymn celebrating a military victory over the Sultan of Ifat's eponymous troops.
What did the Arabs call the northern Somali coast in the 9th century? {sep_token} What did the Chinese call the northern Somali coast in the 9th century? {sep_token} In what century was the term 'Somali' first used? {sep_token} Who ordered that a hymn be composed that first mentioned the Somalis? {sep_token} Where was the Sultanate of Ifat located? {sep_token}