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A few years prior in 1850 , Wimshurst developed an instrument for measuring the power exerted by a propeller shaft — a forerunner of the torsion meter , an instrument for measuring the power transmitted by turbine s. Henry Wimshurst was the father of James Wimshurst , a late-19th century inventor who developed the Wimshurst machine and an early device for generating X-rays .
 Wimshurst, Wimshurst, James Wimshurst, Wimshurst
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Wimshurst, Wimshurst, James Wimshurst, Wimshurst