381002
The left bronchus has no eparterial branch , and therefore it has been supposed by some that there is no upper lobe to the left lung , but that the so-called upper lobe corresponds to the middle lobe of the right lung .
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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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