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His legacy , now a grove of mature trees , is one of Western North America 's oldest university plantings with superior specimens of American Beech , California Incense-cedar , Field Maple , Eastern Hemlock , and an excellent Giant Sequoia .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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