premise: Till-Holger Borchert (born 1967, in Hamburg) is a German art historian and writer specialising in 14th and 15th-century art. He has been the chief curator of the Groeningemuseum and Arentshuis museums in Bruges between 2003 and 2014. In december 2014, he was appointed as artistic director of the Municipal Museums in Bruges.
hypothesis: Till-Holger Borchert was the highest curator at a museum.
reason: It said he is the chief curator. Bu definition, that is the highest curator and thus is definitely correct. 