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Vitamin K2 ( VK2 , menaquinone ) is known to have anticancer activity in vitro and in vivo .
 Chemical: Vitamin K2; Chemical: VK2; Chemical: menaquinone
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Vitamin K2; Chemical: VK2; Chemical: menaquinone