A painting by Vincent van Gogh has been removed from an auction after its authenticity was questioned. The small oil painting has been found at a market in Paris in 1991 and it was sold for less than £1,500. It was said to be a fake by the experts from the van Gogh museum in Amsterdam.Other experts have disagreed with this opinion. The sale was put off when the museum agreed to re-examine the work. After the painting has been examined, it will be put on sale again. Auctioners hope that it will be sold for at least two million.