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The operator " K " given by convolution with an " L " kernel , as above , is known as a Hilbert–Schmidt integral operator .
 person: Hilbert–Schmidt
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Hilbert–Schmidt