Based on the given question and tppic, give an answer. The answer is available on on the internet. The questions are mostly centered around a single named entity.

concept: Ayrton Senna  question:  what is ayrton senna?
['Racecar driver']

concept: John Boehner  question:  where did john boehner come from?
['Ohio']

concept: John Herschel  question:  what did sir john frederick william herschel do?

Cyanotype, Photographic fixer, Actinometer