Problem: Please answer a question about the following article about MP3:
In February 2007, Texas MP3 Technologies sued Apple, Samsung Electronics and Sandisk in eastern Texas federal court, claiming infringement of a portable MP3 player patent that Texas MP3 said it had been assigned. Apple, Samsung, and Sandisk all settled the claims against them in January 2009.
What action did the three companies being sued take?
A: all settled the claims against them
Problem: Please answer a question about the following article about Ministry of Defence (United Kingdom):
Additionally, there are a number of Assistant Chiefs of Defence Staff, including the Assistant Chief of the Defence Staff (Reserves and Cadets) and the Defence Services Secretary in the Royal Household of the Sovereign of the United Kingdom, who is also the Assistant Chief of Defence Staff (Personnel).
There is a Defence Services Secretary in the Royal Household of the what?
A: Sovereign
Problem: Please answer a question about the following article about Solar energy:
In 1974, the unmanned AstroFlight Sunrise plane made the first solar flight. On 29 April 1979, the Solar Riser made the first flight in a solar-powered, fully controlled, man carrying flying machine, reaching an altitude of 40 feet (12 m). In 1980, the Gossamer Penguin made the first piloted flights powered solely by photovoltaics. This was quickly followed by the Solar Challenger which crossed the English Channel in July 1981. In 1990 Eric Scott Raymond in 21 hops flew from California to North Carolina using solar power. Developments then turned back to unmanned aerial vehicles (UAV) with the Pathfinder (1997) and subsequent designs, culminating in the Helios which set the altitude record for a non-rocket-propelled aircraft at 29,524 metres (96,864 ft) in 2001. The Zephyr, developed by BAE Systems, is the latest in a line of record-breaking solar aircraft, making a 54-hour flight in 2007, and month-long flights were envisioned by 2010. As of 2015, Solar Impulse, an electric aircraft, is currently circumnavigating the globe. It is a single-seat plane powered by solar cells and capable of taking off under its own power. The designed allows the aircraft to remain airborne for 36 hours.
When was the first solar powered manned flight made?
A: 29 April 1979
Problem: Please answer a question about the following article about New York City:
There are seven state parks within the confines of New York City, including Clay Pit Ponds State Park Preserve, a natural area which includes extensive riding trails, and Riverbank State Park, a 28-acre (110,000 m2) facility that rises 69 feet (21 m) over the Hudson River.
How many meters is Riverbank State Park elevated above the Hudson River?
A:
21