80790
Alexander Mackenzie ( March 1873 & ndash ; April 1880 ) and Edward Blake ( May 1880 & ndash ; June 1887 ) were chosen by the party caucus .
 Alexander Mackenzie, Edward Blake
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Alexander Mackenzie, Edward Blake