1251
The exact cause of this hearing loss is unclear , though theories range from him simply being born partially deaf to a blow to the head from his father , or a neighborhood bully being to blame .
 disease: deaf
Please list all entity words in the text that fit the category.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} 
Answer:
 disease: deaf