2979
Development of the R. VI benefited from the experience that Siemens-Schuckert and the Idflieg had gained with the R. II , R. III , and R. IV , particularly in its choice of powerplants , where the R. VI was spared from the troublesome Maybach HS engine .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None