121796
Invented in 1892 by German engineer Rudolf Diesel , it was based on the hot bulb engine design and patent ed on February 23 , 1893 .
 German, Rudolf Diesel
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 German, Rudolf Diesel