Another feature in the works uses artificial intelligence to help users create photo albums that various friends can contribute to, as well as a video stream compiled from a group of friends.
For instance, if people went to a wedding, they could all contribute photos from the event that Facebook would compile into a photo album.
And if it's someone's birthday, the person's friends could make short videos and Facebook would stitch them together into a looping video.
The engineers are using machine learning to identify when people want to create a photo album or video stream.
"They're talking about using some basic A.I. techniques to read what a person posted to understand if they're asking for friends to create a photo album or post videos," said Zuckerberg. "You don't necessarily have to add a keyword or press a button. It just understands what you're entering and does the right thing."
Facebook's Hackathons give employees time off from their regular jobs to work on their own Facebook-related projects.
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