and on the institute�*s website, the painting is now only attributed to ivan kliun.des information from the bbc that this painting comes from the zaks collection. and where previously the website said the institute had reviewed the paintings documentation, now it stresses that the data may not have been reviewed and may be inaccurate or incomplete. this is the painting that appeared in the background of two recent hollywood films. we asked the creators of both oppenheimer and the wonderful story of henry sugar if they would like to comment. they haven't responded. another painting from the zaks collection, attributed to the ukrainian artist alexandra exter, is in the cleveland museum of art. its curators expressed interest in the results of our investigation, but declined to comment. we have found out that one more zaks collection painting is in the possession of the albertina museum in vienna. called genoa, it was also attributed to exter. the museum has told us that they conducted their own analysis. the painting is not on display. this brings us to the last step i