Complex sentence: On 21 May, the OCHA reported that airstrikes hit two farms adjacent to a humanitarian facility in Hajjah Governorate which resulted in civilian casualties and a warehouse containing humanitarian supplies was damaged in another strike.
Split into simpler sentences: On 21 May, OCHA reported airstrikes that hit two farms adjacent to a humanitarian facility in Hajjah Governorate and resulted in civilian casualties. A warehouse containing humanitarian supplies was damaged in another strike.