66903
The opera had a partial performance , to piano accompaniment , at the Wigmore Hall in London in 1953 , when the part of Nelson was sung by Peter Pears .
 Nelson, Peter Pears
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Nelson, Peter Pears