Context and question: Parts of what is now Rajasthan were part of the Indus Valley Civilization. Kalibangan, in Hanumangarh district, was a major provincial capital of the Indus Valley Civilization,. It is believed that Western Kshatrapas (405–35 BC) were Saka rulers of the western part of India (Saurashtra and Malwa: modern Gujarat, Southern Sindh, Maharashtra, Rajasthan). They were successors to the Indo-Scythians and were contemporaneous with the Kushans, who ruled the northern part of the Indian subcontinent. The Indo-Scythians invaded the area of Ujjain and established the Saka era (with their calendar), marking the beginning of the long-lived Saka Western Satraps state. Matsya, a state of the Vedic civilisation of India, is said to roughly corresponded to the former state of Jaipur in Rajasthan and included the whole of Alwar with portions of Bharatpur. The capital of Matsya was at Viratanagar (modern Bairat), which is said to have been named after its founder king Virata.
What area did the Saurashtra invade to establish the Saka era?
Answer: unanswerable
Context and question: According to the 2010 Census, 53.5% of Bronx's population was of Hispanic, Latino, or Spanish origin (they may be of any race); 30.1% non-Hispanic Black or African American, 10.9% of the population was non-Hispanic White, 3.4% non-Hispanic Asian, 0.6% from some other race (non-Hispanic) and 1.2% of two or more races (non-Hispanic). The U.S. Census considers the Bronx to be the most diverse area in the country. There is an 89.7 percent chance that any two residents, chosen at random, would be of different race or ethnicity.
How much of the Bronx's population is Hispanic?
Answer: 53.5%
Context and question: After the Dambusters raid in 1943 an entirely new system was developed that was required to knock down any low-flying aircraft with a single hit. The first attempt to produce such a system used a 50 mm gun, but this proved inaccurate and a new 55 mm gun replaced it. The system used a centralised control system including both search and targeting radar, which calculated the aim point for the guns after considering windage and ballistics, and then sent electrical commands to the guns, which used hydraulics to point themselves at high speeds. Operators simply fed the guns and selected the targets. This system, modern even by today's standards, was in late development when the war ended.
What was used to aim the guns after electrical commands were sent?
Answer:
hydraulics