77577
119 , for the 22-year - old Mstislav Rostropovich , who gave the first performance in 1950 , with Sviatoslav Richter .
 person: Mstislav Rostropovich; person: Sviatoslav Richter
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: Mstislav Rostropovich, Sviatoslav Richter 
Answer:
 person: Mstislav Rostropovich; person: Sviatoslav Richter