1834
We describe five families for which direct sequencing of the coding region of the VHL gene had failed to identify the family - specific mutation .
 Disease: VHL
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: VHL 
Answer:
 Disease: VHL