84693
In surgery theory , he made several important contributions : the invention of the assembly map , that enables a functorial description of surgery in the topological category , with his thesis advisor , William Browder , the development of an early surgery theory for stratified spaces , and perhaps most importantly , he pioneered the use of controlled methods in geometric topology and in algebra .
 person: William Browder
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: William Browder 
Answer:
 person: William Browder