Assertion: dove's song | /r/HasProperty | cited as evidence of her  john herald
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text: In connection with the centenary of Martha's death, the song was cited as evidence of her  John Herald , a bluegrass singer, wrote a song dedicated to the extinction of the species and Martha , the species' endling, that he titled "Martha (Last of the Passenger Pigeons)".In connection with the centenary of Martha's death, the song was cited as evidence of her iconic stature—a symbol of the wanton slaughter of these pigeons and the human-caused extinction of the species.