Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: An oil painting by English landscape artist Thomas Gainsborough could leave Britain's shores unless a UK buyer comes forward to buy the £8m work.

Thomas Gainsborough: Export bar put on 'finest' painting