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\*.

the venue and year of earth summit on conservation of biodiversity was
3 to 14 June 1992

who won the mvp in this year's superbowl
Philadelphia Eagles quarterback Nick Foles

where does the story of the trojan war come from

Greek mythology