7795
 In 1987 , Dr. Brian F. Atwater , a geologist with the United States Geological Survey , discovered near the mouth of the Columbia River and in several other estuaries in Washington the scars of a large tsunami , including spruce tree forests that had suddenly turned into salt water tidal flats when the land elevation dropped several feet . '' 
 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: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
Answer:
 location contains: Washington, Columbia River