5692
In 1817 , property in Madison County sold for around $ 2 per acre , while in 1818 it sold for $ 7.40 per acre on average , with some tracts reportedly sold “ at prices ranging from $ 20 to $ 78 per acre , ” at a time when land on the American frontier was sold for $ 2 per acre .
 location: Madison County
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Madison County 
Answer:
 location: Madison County