5090
Without them says Peter Hamer , an Enigma expert , the machine has lost much of its value .
 Peter Hamer, an Enigma expert
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 Peter Hamer, an Enigma expert