original_query: What was the purpose of the investigation conducted by Stefan Maechler in April 1999?
query: What was the purpose of the investigation conducted by Stefan Maechler in April 1999?
answer: Stefan Maechler's investigation, commissioned by Wilkomirski's literary agency in April 1999, aimed to investigate the accusations of fraud against Wilkomirski's memoir, "Fragments: Memories of a Wartime Childhood."