103673
Especially through the work of their racing engineer and department leader Walter Kaaden their engines became nearly unbeatable and in 1961 they nearly won the world championships in the 125 cc class against Soichiro Honda 's four-stroke engines .
 person: Walter Kaaden; person: Soichiro Honda
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Walter Kaaden, Soichiro Honda 
Answer:
 person: Walter Kaaden; person: Soichiro Honda