96439
The locomotive was sold to Isaac Watt Boulton in 1865 ; he intended to convert it into a standard engine , and commissioned drawings for a new conventional boiler and its conversion into standard gauge .
 person: Isaac Watt Boulton
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: Isaac Watt Boulton 
Answer:
 person: Isaac Watt Boulton