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: Henry Hudson  question:  what river did henry hudson sail up?
['Hudson River']

concept: Nelson Mandela  question:  what happened to nelson mandela after he was released from jail?
['President of South Africa']

concept: Brazil  question:  who is the president of brazil now?

Dilma Rousseff