4591
The main explosion on 23 May 1992 destroyed the tube and forced the lava into a new artificial channel , far from Zafferana , and it would have taken months to re-establish a long lava tube .
 Zafferana
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Zafferana