This?

"Woven, built on Alphabet Inc.’s Google Cloud Platform, can begin scheduling events automatically by using AI to detect scheduling conversations between users in Google’s Gmail, or by responding to the command “@Woven” in email. The software pulls data from Google Maps about travel times and factors in the time of day to allow for flexibility and travel between meetings. Like the collaboration features in Google Docs, Woven allows users to make changes to the location and date in real-time, without resorting to multiple email exchanges."

Picture Alphabet (C_A) spiders crawling old g-mail comms and viola - you've got a calendar created with the who/what/where/when/why.