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In page Robert Plant:

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Plant's lyrics with Led Zeppelin were often mystical, philosophical and spiritual, alluding to events in classical and Norse mythology, such as "Immigrant Song", which refers to Valhalla and Viking conquests.[2] However, the song "No Quarter" is often misunderstood to refer to the god Thor; the song actually refers to Mount Thor (which is named after the god). Another example is "The Rain Song".[citation needed]