7144
In some cases an unbiased efficient estimator exists , which , in addition to having the lowest variance among unbiased estimators , satisfies the Cramér–Rao bound , which is an absolute lower bound on variance for statistics of a variable .
 person: Cramér–Rao
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: Cramér–Rao 
Answer:
 person: Cramér–Rao