Problem: Please answer a question about the following article about History of India:
For two and a half centuries from the mid 13th, the politics in the Northern India was dominated by the Delhi Sultanate and in the Southern India by the Vijayanagar Empire which originated as a political heir of the erstwhile Hoysala Empire and Pandyan Empire. However, there were other regional powers present as well. In the North, the Rajputs were a dominant force in the Western and Central India. Their power reached to the zenith under Rana Sanga during whose time Rajput armies were constantly victorious against the Sultanate army. In the South, the Bahmani Sultanate was the chief rival of the Vijaynagara and gave Vijayanagara tough days many a times. In the early 16th century Krishnadevaraya of the Vijayanagara Empire defeated the last remnant of Bahmani Sultanate power after which the Bahmani Sultanate collapsed. It was established either by a Brahman convert or patronized by a Brahman and form that source it got the name Bahmani. In the early 16th century, it collapsed and got split into five small Deccan sultanates. In the East, the Gajapati Kingdom remained a strong regional power to reckon with, so was the Ahom Kingdom in the North-east for six centuries.
What empire dominated in the south of India in the 13th century?
A: Vijayanagar Empire
Problem: Please answer a question about the following article about Han dynasty:
Evidence suggests that blast furnaces, that convert raw iron ore into pig iron, which can be remelted in a cupola furnace to produce cast iron by means of a cold blast and hot blast, were operational in China by the late Spring and Autumn period (722481 BC). The bloomery was nonexistent in ancient China; however, the Han-era Chinese produced wrought iron by injecting excess oxygen into a furnace and causing decarburization. Cast iron and pig iron could be converted into wrought iron and steel using a fining process.
What type of process was used to convert various metals into steel?
A: fining
Problem: Please answer a question about the following article about Arena Football League:
In 2001, Jeff Foley published War on the Floor: An Average Guy Plays in the Arena Football League and Lives to Write About It. The book details a journalist's two preseasons (1999 and 2000) as an offensive specialist/writer with the now-defunct Albany Firebirds. The 5-foot-6 (170 cm), self-described "unathletic writer" played in three preseason games and had one catch for 2 yards.
Who wrote War on the Floor: An Average Guy Plays in the Arena Football League and Lives to Write About It?
A: Jeff Foley
Problem: Please answer a question about the following article about Richard Feynman:
He also developed Feynman diagrams, a bookkeeping device that helps in conceptualizing and calculating interactions between particles in spacetime, including the interactions between electrons and their antimatter counterparts, positrons. This device allowed him, and later others, to approach time reversibility and other fundamental processes. Feynman's mental picture for these diagrams started with the hard sphere approximation, and the interactions could be thought of as collisions at first. It was not until decades later that physicists thought of analyzing the nodes of the Feynman diagrams more closely. Feynman painted Feynman diagrams on the exterior of his van.
Where did Feynman paint his diagrams?
A:
his van