Less than a week after International Business Machines Corp. acquired Promontory Financial Group to increase the brainpower of its Watson artificial intelligence computing system, an Am Law 200 firm has partnered with a legal startup combining Watson’s AI platform with its own proprietary technology.

Womble Carlyle Sandridge & Rice announced Wednesday that it has become the latest big firm to ink an agreement with ROSS Intelligence, a legal research service that made waves earlier this year. The company touts its ability to apply advances in “machine learning” to legal services, leaving some to worry, probably prematurely, about hordes of robot lawyers.