Question: Mary Ochsenhirt Amdur studied the effects of which historic air inversion that killed 20 people?
Sentence (from "Qalb Loze massacre"): The Qalb Loze massacre was a reported massacre of Syrian Druze on 10 June 2015 in the village of Qalb Loze in Syria's northwestern Idlib Governorate.
Relevant evidence: No