274480
At the same time , letters from representatives of Libya in which it stated its intention to encourage those accused of the bombing of Pan Am Flight 103 over Lockerbie , Scotland and the bombing of UTA Flight 772 over Chad and Niger to co-operate with the concerned authorities was noted .
 Libya, Lockerbie, Chad, Niger
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Libya, Lockerbie, Chad, Niger