81943
The long-term trend of consumption has been to increase year over year since 1950 , with dips around the introduction of corporate average fuel economy standards and the 1979 energy crisis , the early 1990 s recession and Gulf War , and the Great Depression .
 Gulf War, Great Depression
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Gulf War, Great Depression