3488
Initially , Gerald Ford and Jimmy Carter tried to operate without a chief of staff , but each eventually appointed one .
 person: Gerald Ford; person: Jimmy Carter
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: Gerald Ford; person: Jimmy Carter