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History Desire Petroleum was founded in 1996 by Dr Colin Phipps , a former geologist for Royal Dutch Shell .
 Desire Petroleum, Dr Colin Phipps, Royal Dutch Shell
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Desire Petroleum, Dr Colin Phipps, Royal Dutch Shell