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https://jglobal.jst.go.jp/detail?JGLOBAL_ID=200902205432957643
https://ibarakinews.jp/news/newsdetail.php?f_jun=16564168028993
https://www.47news.jp/7977465.html
https://yamap.com/activities/20141459
https://www.biodic.go.jp/reports/oldbird/ae097.html
