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In December 1990 , she participated in a concert held at the Tokyo Dome to commemorate John Lennon 's 50th birthday , and to raise awareness of environmental issues .
 location: Tokyo Dome; person: John Lennon
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:
 location: Tokyo Dome; person: John Lennon