Context and question: Inline hockey was first played in 1995 and has also become more and more popular in the last years. The Women's inline hockey National Team participated in the 2008 FIRS World Championships. Namibia is the home for one of the toughest footraces in the world, the Namibian ultra marathon. The most famous athlete from Namibia is Frankie Fredericks, sprinter (100 and 200 m). He won four Olympic silver medals (1992, 1996) and also has medals from several World Athletics Championships. He is also known for humanitarian activities in Namibia and beyond.
How many Olympic silver medals did Frankie Fredericks win at the 1992 Olympics?
Answer: unanswerable
Context and question: Donald Wills Douglas, Sr. built a plant in 1922 at Clover Field (Santa Monica Airport) for the Douglas Aircraft Company. In 1924, four Douglas-built planes took off from Clover Field to attempt the first aerial circumnavigation of the world. Two planes made it back, after having covered 27,553 miles (44,342 km) in 175 days, and were greeted on their return September 23, 1924, by a crowd of 200,000 (generously estimated). The Douglas Company (later McDonnell Douglas) kept facilities in the city until the 1960s.
In what year was Donald Wills Douglas, Sr. born?
Answer: unanswerable
Context and question: Short-term memory is also known as working memory. Short-term memory allows recall for a period of several seconds to a minute without rehearsal. Its capacity is also very limited: George A. Miller (1956), when working at Bell Laboratories, conducted experiments showing that the store of short-term memory was 7±2 items (the title of his famous paper, "The magical number 7±2"). Modern estimates of the capacity of short-term memory are lower, typically of the order of 4–5 items; however, memory capacity can be increased through a process called chunking. For example, in recalling a ten-digit telephone number, a person could chunk the digits into three groups: first, the area code (such as 123), then a three-digit chunk (456) and lastly a four-digit chunk (7890). This method of remembering telephone numbers is far more effective than attempting to remember a string of 10 digits; this is because we are able to chunk the information into meaningful groups of numbers. This may be reflected in some countries in the tendency to display telephone numbers as several chunks of two to four numbers.
What year did George A. Miller work at AT&T?
Answer:
unanswerable