257952
He operated from 1987 to 2000 , and was known as the " Tourniquet Killer " since he used a ligature with either a toothbrush or bamboo stick to tighten or loosen the ligature .
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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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