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Extreme-ultraviolet astronomy ( 10 – 100 " nm ) is a discipline in its own right and involves many of the techniques of X-ray astronomy ; the Extreme Ultraviolet Explorer ( 1992 ) was a satellite operating at these wavelengths .
 instrument: Extreme Ultraviolet Explorer
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: Extreme Ultraviolet Explorer 
Answer:
 instrument: Extreme Ultraviolet Explorer