Litigation powerhouse Lenczner Slaght is representing Canada’s largest news outlets in a lawsuit accusing U.S.-based artificial intelligence organization OpenAI of infringing their copyright by unlawfully scraping news content to train products like ChatGPT.

The outlets—the Canadian Broadcasting Corporation, The Canadian Press news service, and some of the country’s largest publishers including The Globe and Mail, Toronto Star, and Postmedia—filed their suit in Ontario’s Superior Court of Justice on Friday.