27506
The caves are a legacy of Dunhuang 's emergence more than 2,000 years ago during the Han Dynasty as a crucial entranceway into China by the Silk Road , which served as the principal trade route to the West .
 location contains: China, Dunhuang
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
Answer:
 location contains: China, Dunhuang