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Although the screw propeller had been added to an engine ( steam engine ) as early as the 18th century in Birmingham , England , by James Watt , boats powered by a petrol engine only came about in the later part of the 19th century with the invention of the internal combustion engine .
 Birmingham, England, James Watt
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Birmingham, England, James Watt