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Much civil-defence preparation in the form of shelters was left in the hands of local authorities, and many areas such as Birmingham, Coventry, Belfast and the East End of London did not have enough shelters. The Phoney War, however, and the unexpected delay of civilian bombing permitted the shelter programme to finish in June 1940.:35 The programme favoured backyard Anderson shelters and small brick surface shelters; many of the latter were soon abandoned in 1940 as unsafe. In addition, authorities expected that the raids would be brief and during the day. Few predicted that attacks by night would force Londoners to sleep in shelters.

Why were the shelters soon abandoned in 1940?
Answer: unsafe

Problem: Palmerston died in 1865, and after a brief ministry led by Russell, Derby returned to power. In 1866, Victoria attended the State Opening of Parliament for the first time since Albert's death. The following year she supported the passing of the Reform Act 1867 which doubled the electorate by extending the franchise to many urban working men, though she was not in favour of votes for women. Derby resigned in 1868, to be replaced by Benjamin Disraeli, who charmed Victoria. "Everyone likes flattery," he said, "and when you come to royalty you should lay it on with a trowel." With the phrase "we authors, Ma'am", he complimented her. Disraeli's ministry only lasted a matter of months, and at the end of the year his Liberal rival, William Ewart Gladstone, was appointed prime minister. Victoria found Gladstone's demeanour far less appealing; he spoke to her, she is thought to have complained, as though she were "a public meeting rather than a woman".
How long did Disralei last in office?
The answer is the following: only lasted a matter of months

The Shunga Empire or Shunga Empire was an ancient Indian dynasty from Magadha that controlled vast areas of the Indian subcontinent from around 187 to 78 BCE. The dynasty was established by Pushyamitra Shunga, after the fall of the Maurya Empire. Its capital was Pataliputra, but later emperors such as Bhagabhadra also held court at Besnagar, modern Vidisha in Eastern Malwa. Pushyamitra Shunga ruled for 36 years and was succeeded by his son Agnimitra. There were ten Shunga rulers. The empire is noted for its numerous wars with both foreign and indigenous powers. They fought battles with the Kalingas, Satavahanas, the Indo-Greeks, and possibly the Panchalas and Mathuras. Art, education, philosophy, and other forms of learning flowered during this period including small terracotta images, larger stone sculptures, and architectural monuments such as the Stupa at Bharhut, and the renowned Great Stupa at Sanchi. The Shunga rulers helped to establish the tradition of royal sponsorship of learning and art. The script used by the empire was a variant of Brahmi and was used to write the Sanskrit language. The Shunga Empire played an imperative role in patronizing Indian culture at a time when some of the most important developments in Hindu thought were taking place.
What tradition did Shunga rulers help begin?
sponsorship of learning and art

Input: New Delhi
With a total area of 42.7 km2 (16.5 sq mi), New Delhi forms a small part of the Delhi metropolitan area. Because the city is located on the Indo-Gangetic Plain, there is little difference in elevation across the city. New Delhi and surrounding areas were once a part of the Aravalli Range; all that is left of those mountains is the Delhi Ridge, which is also called the Lungs of Delhi. While New Delhi lies on the floodplains of the Yamuna River, it is essentially a landlocked city. East of the river is the urban area of Shahdara. New Delhi falls under the seismic zone-IV, making it vulnerable to earthquakes.

New Delhi is located on the floodplains of what river?
Output: Yamuna River

Input: Article: A servomotor is a motor, very often sold as a complete module, which is used within a position-control or speed-control feedback control system mainly control valves, such as motor-operated control valves. Servomotors are used in applications such as machine tools, pen plotters, and other process systems. Motors intended for use in a servomechanism must have well-documented characteristics for speed, torque, and power. The speed vs. torque curve is quite important and is high ratio for a servo motor. Dynamic response characteristics such as winding inductance and rotor inertia are also important; these factors limit the overall performance of the servomechanism loop. Large, powerful, but slow-responding servo loops may use conventional AC or DC motors and drive systems with position or speed feedback on the motor. As dynamic response requirements increase, more specialized motor designs such as coreless motors are used. AC motors' superior power density and acceleration characteristics compared to that of DC motors tends to favor PM synchronous, BLDC, induction, and SRM drive applications.

Now answer this question: What factors limit performance of servo motors?

Output: winding inductance and rotor inertia

Problem: Zapatist forces, which were based in neighboring Morelos had strengths in the southern edge of the Federal District, which included Xochimilco, Tlalpan, Tlahuac and Milpa Alta to fight against the regimes of Victoriano Huerta and Venustiano Carranza. After the assassination of Carranza and a short mandate by Adolfo de la Huerta, Alvaro Obregon took power. After willing to be re-elected, he was killed by Jose de Leon Toral, a devout Catholic, in a restaurant near La Bombilla Park in San Angel in 1928. Plutarco Elias Calles replaced Obregon and culminated the Mexican Revolution.
When was Alvaro Obregon killed?
The answer is the following:
1928