instruction:
In this task, you are given a question. You have to answer the question based on your information.
question:
Which four kingdoms did the Great Heathen Army invade?
answer:
Northumbria, Mercia, East Anglia and Wessex


question:
What is the area of the country for which Facinet Keita was the flag bearer for the 2012 Summer Olympics?
answer:
245,860 km2


question:
Where is the headquarter of  German airline Germania?
answer:

Berlin