1844
As a result of the northern fault zone and the vertical or , sometimes even overfolded , geological strata , the geology of the Harz sometimes changes frequently within a relatively small area of just a few square kilometres .
 location: Harz
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Harz