Explainer-How is the Nobel Peace Prize decided?

By Gwladys FoucheOSLO, Oct 6 (Reuters) - The Nobel Peace Prize will be announced on Friday. Here is a look at how the award works:WHO IS NOMINATED?Some 287 candidates have been nominated,including 208 individuals and 79 organisations. We don't know who because the list is kept secret for 50 years, inside a vault in the basement of the Norwegian Nobel…