27409
Keyboards with dynamically changeable keys are useful for less represented languages , non-standard keyboard layouts such as Dvorak , or for special non-alphabetical applications such as video editing or games .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None