37801
According to quantum mechanics , when the system is in state I , Bob 's " x " - spin measurement will have a 50 % probability of producing + " x " and a 50 % probability of - " x " .
 person: Bob
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: Bob 
Answer:
 person: Bob