instruction:
Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.
question:
sir john soane (10 september 1753 – 20 january 1837) was an english architect.
answer:
john soane


question:
the calculus of variations is a field of mathematical analysis.
answer:
calculus of variations


question:
bubikon is a municipality in the district of hinwil in the canton of zurich in switzerland.
answer:

bubikon