In this task, you are given a question. You have to answer the question based on your information.

Who were the two parties fighting in the war where Kajiwara Heima served as karō?
Tokugawa shogunate and those seeking to return political power to the Imperial Court

How old is the fossil record of the order that contains the only strictly marine herbivorous mammal?
50-million-year-old fossil record

Who is the artist that sings both "Fading" and "Take a Bow"?

Rihanna