8634
Often cited as ' America 's answer to Led Zeppelin ' , it is held to be highly influential amongst hard rock/heavy metal musicians including Iron Maiden , both of whom have recorded and/or performed cover versions of songs from the album .
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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:
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