
Are the following mentions coreferent?:
<m> said </m> in A refugee camp was the target of an air strike in South Sudan's Unity state on Thursday, less than 50 km ( 30 miles ) from the tense border with Sudan, a Reuters witness said. The Reuters correspondent heard a large explosion then saw a crater about two metres ( 6. 6 feet ) wide, an unexploded bomb wedged in the side of a school building and a white aircraft flying north from the Yida refugee camp. 
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<m> according to </m> in According to the director of operations of the United Nations Relief and Works Agency for Palestine Refugees in the Near East, John Ging, some 30 people were killed and 55 others were injured, five of them critically, when three artillery shells landed at the perimeter of a school, which usually serves as a girls'preparatory school, in the Jabaliya refugee camp. 