Input: Article: The period saw several important technical innovations, like the principle of linear perspective found in the work of Masaccio, and later described by Brunelleschi. Greater realism was also achieved through the scientific study of anatomy, championed by artists like Donatello. This can be seen particularly well in his sculptures, inspired by the study of classical models. As the centre of the movement shifted to Rome, the period culminated in the High Renaissance masters da Vinci, Michelangelo and Raphael.

Now answer this question: Which artistic principle was innovated by Brunelleschi?

Output: linear perspective

Input: Article: Critics stated that both The Sun and Lord Kilbracken cherry-picked the results from one specific study while ignoring other data reports on HIV infection and not just AIDS infection, which the critics viewed as unethical politicisation of a medical issue. Lord Kilbracken himself criticised The Sun's editorial and the headline of its news story; he stated that while he thought that gay people were more at risk of developing AIDS it was still wrong to imply that no one else could catch the disease. The Press Council condemned The Sun for committing what it called a "gross distortion". The Sun later ran an apology, which they ran on Page 28. Journalist David Randall argued in the textbook The Universal Journalist that The Sun's story was one of the worst cases of journalistic malpractice in recent history, putting its own readers in harm's way.

Now answer this question: What did David Randall say about the Sun's AIDS story?

Output: The Sun's story was one of the worst cases of journalistic malpractice in recent history

Input: Article: Sex was used as an important element in the content and marketing the paper from the start, which Lamb believed was the most important part of his readers' lives. The first topless Page 3 model appeared on 17 November 1970, German-born Stephanie Rahn; she was tagged as a "Birthday Suit Girl" to mark the first anniversary of the relaunched Sun. A topless Page 3 model gradually became a regular fixture, and with increasingly risque poses. Both feminists and many cultural conservatives saw the pictures as pornographic and misogynistic. Lamb expressed some regret at introducing the feature, although denied it was sexist. A Conservative council in Sowerby Bridge, Yorkshire, was the first to ban the paper from its public library, shortly after Page 3 began, because of its excessive sexual content. This decision was reversed after a sustained campaign by the newspaper itself lasting 16 months, and the election of a Labour-led council in 1971.

Now answer this question: When was the library ban reversed?

Output:
1971