5763
Archaeological evidence in the 1930 s showed that the city of Ai , an early target for conquest in the putative Joshua account , had existed and been destroyed , but in the 22nd century BCE .
 location: Ai
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: Ai