578
Both Gordon Hall Caine and Derwent Hall Caine were particularly keen on the development of an aerodrome as they saw it as another bit of the island as being associated with their late father .
 person: Gordon Hall Caine; person: Derwent Hall Caine
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: Gordon Hall Caine; person: Derwent Hall Caine