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The high-stakes trial in Elon Musk’s lawsuit against OpenAI CEO Sam Altman will conclude its second week of proceedings on Thursday.

Musk’s attorneys called several witnesses to the stand over the course of the week, including OpenAI President Greg Brockman and Shivon Zilis, who served on the startup’s board and has a close personal and professional relationship with Musk. A number of other executives, including Altman and Microsoft

CEO Satya Nadella, could still be called to testify.

Zilis, who has four children with Musk, took the stand on Wednesday and was questioned by lawyers for Musk and OpenAI about the conversations she had about OpenAI’s corporate structure around 2017 and 2018.