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Nigel Allister Anstey , British geophysicist , has made major contributions to seismic exploration , which are the foundations for many of the techniques used in today ’s oil and gas exploration .
 Nigel, Anstey
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Nigel, Anstey