Task: Explanation
Input (English): Ferdinand III (German: "Ferdinand Josef Johann Baptist"; Italian: "Ferdinando Giuseppe Giovanni Baptista"; English: "Ferdinand Joseph John Baptist"; 6 May 1769 – 18 June 1824) was Grand Duke of Tuscany from 1790 to 1801 and, after a period of disenfranchisement, again from 1814 to 1824. He was also the Prince-elector and Grand Duke of Salzburg (1803–1805) and Grand Duke of Würzburg (1805–1814). Question: The owner of the painting The Madonna del Granduca held what title from 1805-1814? Answer: Grand Duke of Würzburg
Output (English):  He was also the Princeelector and Grand Duke of Salzburg 1803–1805 and Grand Duke of Würzburg 1805–1814.