I want to know the answer to the following question:
Danelaw, established by the Vikings, covered what  geographical area?
All the background I'm provided with is that "It was an area of political and geographical control imposed by the Viking incursions which was formally agreed to by the Danish warlord, Guthrum and west-Saxon king, Alfred the Great in 886 AD.". Is that enough to answer the question?
Answer: no