Task: Explanation
Input (English): Portrait of Mariana of Austria is an oil-on-canvas painting by Diego Velázquez completed in 1652–53. Mariana, then nineteen years old, was the daughter of Emperor Ferdinand III and the Infanta Maria, and as the second wife of Philip IV became Queen consort of Spain. She was known as Maria Anna to contemporaries and is shown here as rather plain looking, wearing an unhappy expression. Question: The mother of the girl featured in the Portrait of Marianna of Austria was born in which year? Answer: 1606
Output (English):  Mariana, then nineteen years old, was the daughter of Emperor Ferdinand III and the Infanta Maria, and as the second wife of Philip IV became Queen consort of Spain.