Twitter agreed to acquire Fabula AI, a London-based start-up, with a world-class team of machine learning researchers who employ graph deep learning to detect network manipulation. Financial terms were not disclosed. “We are really excited to join the ML research team at Twitter, and work together to grow their team and capabilities. Specifically, we are looking forward to applying our graph deep learning techniques to improving the health of the conversation across the service,” said Michael Bronstein, Fabula AI founder.