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Overland explorers entered the Willamette Valley through the scenic but treacherous Columbia River Gorge , and pioneers began to settle the valley in increasing numbers .
 location: Willamette Valley; location: Columbia River Gorge
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Willamette Valley, Columbia River Gorge 
Answer:
 location: Willamette Valley; location: Columbia River Gorge