9025
His third great-grandfather , David Olyphant , and great-great-grandfather , Robert Morrison Olyphant , were both prominent businessmen .
 person: David Olyphant; person: Robert Morrison Olyphant
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: David Olyphant; person: Robert Morrison Olyphant