Problem: Please answer a question about the following article about Paris:
The centre of Paris contains the most visited monuments in the city, including the Notre Dame Cathedral and the Louvre as well as the Sainte-Chapelle; Les Invalides, where the tomb of Napoleon is located, and the Eiffel Tower are located on the Left Bank south-west of the centre. The banks of the Seine from the Pont de Sully to the Pont d'Iena have been listed as a UNESCO World Heritage Site since 1991. Other landmarks are laid out east to west along the historic axis of Paris, which runs from the Louvre through the Tuileries Garden, the Luxor Column in the Place de la Concorde, the Arc de Triomphe, to the Grande Arche of La Defense.
What is housed at Les Invalides?
A: the tomb of Napoleon
Problem: Please answer a question about the following article about Railway electrification system:
An early advantage of AC is that the power-wasting resistors used in DC locomotives for speed control were not needed in an AC locomotive: multiple taps on the transformer can supply a range of voltages. Separate low-voltage transformer windings supply lighting and the motors driving auxiliary machinery. More recently, the development of very high power semiconductors has caused the classic "universal" AC/DC motor to be largely replaced with the three-phase induction motor fed by a variable frequency drive, a special inverter that varies both frequency and voltage to control motor speed. These drives can run equally well on DC or AC of any frequency, and many modern electric locomotives are designed to handle different supply voltages and frequencies to simplify cross-border operation.
What will AC/DC motor be replaced with?
A: three-phase induction motor
Problem: Please answer a question about the following article about Communications in Somalia:
According to the Somali Economic Forum, the number of internet users in Somalia rose from only 200 in the year 2000 to 106,000 users in 2011, with the percentage continuing to rise. The number of mobile subscribers is similarly expected to rise from 512,682 in 2008 to around 6.1 million by 2015.
What was the number of mobile subscribers in Somalia in 2008?
A: 512,682
Problem: Please answer a question about the following article about General Electric:
General Electric heavily contaminated the Hudson River with polychlorinated biphenyls (PCBs) between 1947-77. This pollution caused a range of harmful effects to wildlife and people who eat fish from the river or drink the water. In response to this contamination, activists protested in various ways. Musician Pete Seeger founded the Hudson River Sloop Clearwater and the Clearwater Festival to draw attention to the problem. The activism led to the site being designated by the EPA as one of the superfund sites requiring extensive cleanup. Other sources of pollution, including mercury contamination and sewage dumping, have also contributed to problems in the Hudson River watershed.
What designation did the EPA give to the site of GE's Hudson River pollution
A:
superfund