
Are the following mentions coreferent?:
<m> Say </m> in Officials said that military aircraft from Sudan crossed the new international border with South Sudan and dropped bombs Thursday in and around a camp filled with refugees. One day after bombings were reported in another region of South Sudan, an attack that provoked strong condemnation from the U. S. State Department. 
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<m> explain </m> in Israel moved quickly to explain the attack on the Jabalya school, saying its forces had been fired on first. John Ging, the top UN refugee official in Gaza, said UN staff and Palestinian families in the school compound had been screened for weapons, and he disputed Israel's claim that mortars were fired from inside. 