4087
The former US Senator , Gary Hart , is due in Northern Ireland to meet representatives of the main parties at Stormont . http://t.co/WwVYa2j1wr
 US, Gary Hart, Northern Ireland, Stormont
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 US, Gary Hart, Northern Ireland, Stormont