Before revision:  This model describes the cascade as a two-stage process: initially, a cascade spreads as an ordinary newsstory; a second cascade thenemerges through attempts to disclose and rectify the falsity of the news  story.
After revision:  This model describes the cascade as a two-stage process: initially, fake news spreads as a piece of ordinary news; then, when most users start recognizing the falsity of the news story.