
Are the following mentions coreferent?:
<m> said </m> in Dr. Mahmoud Abbas, the director of the Palestinian Medical Association said that there is a complete absence of accountability for the escalating number of civilian deaths in Gaza. 
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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. 