4550
In parliament he started off his governmental career in 1912 working as Parliamentary Private Secretary for Percy Illingworth who was the Parliamentary Secretary to the Treasury .
 person: Percy Illingworth
Please list all entity words in the text that fit the category.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} 
Answer:
 person: Percy Illingworth