364329
Metal carbonyls are toxic by skin contact , inhalation or ingestion , in part because of their ability to carbonylate hemoglobin to give carboxyhemoglobin , which prevents the binding of O2 .
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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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