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Ankylosing spondylitis is diagnosed once or twice in each 1000 males and one tenth as frequently in females , but the true prevalence is unknown .
 Disease: Ankylosing spondylitis
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
 Entities: Ankylosing spondylitis 
Answer:
 Disease: Ankylosing spondylitis