Ƙirƙirar wani nau'i mai mahimmanci na wannan jumla Richard Axel an san shi ne babban mai son opera kuma an kira shi'opera addict'ta kyautar Nobel Eric Kandel.
Tabbas, wani nau'i mai rikitarwa na jumla shine "Richard Axel an san shi ne babban mai son opera kuma ya halarci wasan kwaikwayo na farko na Joan Sutherland a New York's Metropolitan Opera tare da abokinsa na makarantar sakandare Jerold Brenowitz, wanda daga bisani ya zama likitan zuciya. "