314824
He was elected to the Canadian House of Commons in the 1974 federal election for the riding of Battleford — Kindersley and sat in the federal Liberal caucus of Pierre Trudeau serving as a parliamentary secretary and then Government Whip .
 federal, federal Liberal, Pierre Trudeau
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 federal, federal Liberal, Pierre Trudeau