31774
It was the site of the experiments by Sidney Gilchrist Thomas and his cousin Percy Gilchrist that led to " the basic steel process " or " Gilchrist-Thomas process " .
 person: Sidney Gilchrist Thomas; person: Percy Gilchrist
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: Sidney Gilchrist Thomas, Percy Gilchrist 
Answer:
 person: Sidney Gilchrist Thomas; person: Percy Gilchrist