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Conservation efforts in the 1950 s stabilised the population , but prey species declined again in the wake of the Iranian Revolution ( 1979 ) and the Iran–Iraq War ( 1980 – 1988 ) , leading to a significant contraction of the cheetah 's historical range in the region .
 event: Iranian Revolution; event: Iran–Iraq War
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Iranian Revolution, Iran–Iraq War 
Answer:
 event: Iranian Revolution; event: Iran–Iraq War