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Engraved in the rock are 163 inscriptions and pictures , which include 114 hydrological annotations , which give detailed records of water levels in the river over 1,200 years , since the first year of the Tang dynasty Guangde era , 763 ; the assembled inscriptions and fish carvings , taken together , formed the longest such sequence in the world .
 location: Tang dynasty Guangde era
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: Tang dynasty Guangde era