Input: Article: The complete technical disclosure of the Columbia LP by Peter C. Goldmark, Rene' Snepvangers and William S. Bachman in 1949 made it possible for a great variety of record companies to get into the business of making long playing records. The business grew quickly and interest spread in high fidelity sound and the do-it-yourself market for pickups, turntables, amplifier kits, loudspeaker enclosure plans, and AM/FM radio tuners. The LP record for longer works, 45 rpm for pop music, and FM radio became high fidelity program sources in demand. Radio listeners heard recordings broadcast and this in turn generated more record sales. The industry flourished.

Now answer this question: What aided in records sales in the 1950s?

Output: Radio listeners heard recordings broadcast

Input: Article: Muslim scientists placed far greater emphasis on experiment than had the Greeks. This led to an early scientific method being developed in the Muslim world, where significant progress in methodology was made, beginning with the experiments of Ibn al-Haytham (Alhazen) on optics from c. 1000, in his Book of Optics. The law of refraction of light was known to the Persians. The most important development of the scientific method was the use of experiments to distinguish between competing scientific theories set within a generally empirical orientation, which began among Muslim scientists. Ibn al-Haytham is also regarded as the father of optics, especially for his empirical proof of the intromission theory of light. Some have also described Ibn al-Haytham as the "first scientist" for his development of the modern scientific method.

Now answer this question: What theory did Ibn al-Haytham have proof for?

Output: the intromission theory of light

Input: Article: Devotions to artistic depictions of Mary vary among Christian traditions. There is a long tradition of Roman Catholic Marian art and no image permeates Catholic art as does the image of Madonna and Child. The icon of the Virgin Theotokos with Christ is without doubt the most venerated icon in the Orthodox Church. Both Roman Catholic and Orthodox Christians venerate images and icons of Mary, given that the Second Council of Nicaea in 787 permitted their veneration with the understanding that those who venerate the image are venerating the reality of the person it represents, and the 842 Synod of Constantinople confirming the same. According to Orthodox piety and traditional practice, however, believers ought to pray before and venerate only flat, two-dimensional icons, and not three-dimensional statues.

Now answer this question: What is the name given to artistic depictions of Mary?

Output:
Marian art