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: John F Kennedy  question:  who became president when jfk was killed?
['Lyndon B. Johnson']

concept: Jessica Ennis  question:  what is jessica ennis sport?
['Track and field athletics']

concept: Olympic Games  question:  when do they have the olympics?

Once every two years