21938
IN April 1998 , the Army Corps of Engineers dumped 600 tons of boulders and dirt over an area near the Columbia River in Washington where , two years earlier , the oldest known skeleton in North America -- dubbed Kennewick Man -- had been found .
 location contains: Washington, Columbia River
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: Washington, Columbia River