204593
Balcombe Street Siege On 6 December 1975 , four members of the Provisional IRA barricaded themselves in a flat in Balcombe Street , Marylebone with two hostages .
 Provisional IRA, Marylebone
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Provisional IRA, Marylebone