In this task, You are given an open-domain question that can be answered based on factual information. Your task is to provide \*short\* answer (in a few words only) for the given question. The short answer can be one or more entities or it can also be boolean \*yes\* or \*no\*.

when did robben island became a world heritage site
1999

who is playing the guitar in august rush
Kaki King

it has served as indias tomb of the unknown soldier

Amar Jawan Jyoti