53557
By 1912 Arthur Pollen had developed an electrically driven mechanical analog computer for fire-control systems , based on the differential analyser .
 Arthur Pollen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Arthur Pollen