97691
There is little evidence that tree growth was influenced by cold in what are currently the Western United States , where the eruption may have interrupted a prolonged drought period .
 location: Western United States; disease: drought
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: Western United States, drought 
Answer:
 location: Western United States; disease: drought