
Are the following mentions coreferent?:
<m> air strike </m> in South Sudan accuses Sudan of air strike on refugee camp
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<m> mortar strike </m> in An Israeli mortar strike that killed about 40 Palestinians sheltering in a UN school Tuesday brought new urgency to diplomatic efforts to end Israel's military onslaught in the Gaza Strip. The Israeli army said the UN school in the Jabaliya refugee camp was hit when troops responded to a mortar attack from the grounds and that the dead included a number of Hamas militants. The mortar strike in Jabaliya was the second attack on a school run by the UN Relief and Works Agency, or UNRWA. 