Task: Question Generation
Input (English): Passage: Monets Le Pont du chemin de fer à Argenteuil, an 1873 painting of a railway bridge spanning the Seine near Paris, was bought by an anonymous telephone bidder for a record $41.4 million at Christies auction in New York on 6 May 2008. The previous record for his painting stood at $36.5 million. Just a few weeks later, Le bassin aux nymphéas (from the water lilies series) sold at Christies 24 June 2008 auction in London, lot 19, for £36,500,000 ($71,892,376.34) (hammer price) or £40,921,250 ($80,451,178) with fees, nearly doubling the record for the artist and representing one of the top 20 List of most expensive paintings at the time.
Output (English): How many days after Monets Le Pont du chemin de fer à Argenteuil was bought was Le bassin aux nymphéas sold?