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The explorations of James Cook in 1778 and George Vancouver in 1792 – 93 established British jurisdiction over the coastal area north and west of the Columbia River .
 James Cook, George Vancouver, Columbia River
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 James Cook, George Vancouver, Columbia River