According to Giuliani, who wasn't there, it was a large gathering where one or more people were telling POTUS that Yovanovitch was undermining him in Ukraine, to which he replied that she should be removed. It is unclear whether Parnas and Trump had any meaningful interchange.
*Recording of Trump calling for Yovanovitch’s ouster appears to corroborate Parnas’s account***
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So What???? He’s entitled to oust any ole diplomat he wants to. It’s not a crime and she should have been ousted long before.