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.

[Q]: concept: J J Thomson  question:  what subatomic particles did jj thomson discover?
[A]: ['Electron']


[Q]: concept: Fifa World Cup  question:  when does the world cup occur?
[A]: ['Every 4 Years']


[Q]: concept: Riannah  question:  what record label is rihanna signed to 2012?
[A]:
Def Jam Recordings