51770
They were discovered in the United States in 1987 , in New Zealand in 2000 , and in Devon , United Kingdom in 1992 .
 United States, New Zealand, Devon, United Kingdom
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 United States, New Zealand, Devon, United Kingdom