143767
1975 Bernardo Leighton assassination attempt According to declassified CIA documents , in 1975 , he met with Italian Gladio member Stefano Delle Chiaie , founder of Avanguardia Nazionale , and was also in contact with OAS member Albert Spaggiari .
 Bernardo Leighton, Stefano Delle Chiaie, Avanguardia Nazionale, OAS, Albert Spaggiari
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bernardo Leighton, Stefano Delle Chiaie, Avanguardia Nazionale, OAS, Albert Spaggiari