(Reuters) -Amazon is joining Microsoft in backing legislation to further limit chipmaker Nvidia's ability to export to China, the Wall Street Journal reported on Thursday, citing people familiar with the matter. The legislation, known as the Gain AI act, is also backed by AI startup Anthropic, the Journal said. Reuters could not immediately verify the report. (Reporting by Ananya Palyekar in Bengaluru; Editing by Rashmi Aich) (The article has been published through a syndicated feed. Except for the headline, the content has been published verbatim. Liability lies with original publisher.)