Problem: Extract the answer to the question from the following context. Question: Why might a gymnast increase lower body amplitude? Context: A higher flight phase results in a higher vertical ground reaction force. Vertical ground reaction force represents external force which the gymnasts have to overcome with their muscle force and has an impact on the gymnasts linear and angular momentum. Another important variable that affects linear and angular momentum is time the landing takes Gymnasts can alter the shape of the area by increasing the time taken to perform the landing. Gymnasts can achieve this by increasing hip, knee and ankle amplitude. With the increase of height, the amplitude in ankles knees and hips rise the bars.

A: perform the landing

Problem: Extract the answer to the question from the following context. Question: Why are quadraphonic records named as such? Context: The development of quadraphonic records was announced in 1971. These recorded four separate sound signals. This was achieved on the two stereo channels by electronic matrixing, where the additional channels were combined into the main signal. When the records were played, phase-detection circuits in the amplifiers were able to decode the signals into four separate channels. There were two main systems of matrixed quadraphonic records produced, confusingly named SQ (by CBS) and QS (by Sansui). They proved commercially unsuccessful, but were an important precursor to later surround-sound systems, as seen in SACD and home cinema today.

A: four separate sound signals

Problem: Extract the answer to the question from the following context. Question: What is significant about this area? Context: Temperatures in Israel vary widely, especially during the winter. Coastal areas, such as those of Tel Aviv and Haifa, have a typical Mediterranean climate with cool, rainy winters and long, hot summers. The area of Beersheba and the Northern Negev has a semi-arid climate with hot summers, cool winters and fewer rainy days than the Mediterranean climate. The Southern Negev and the Arava areas have desert climate with very hot and dry summers, and mild winters with few days of rain. The highest temperature in the continent of Asia (54.0 C or 129.2 F) was recorded in 1942 at Tirat Zvi kibbutz in the northern Jordan river valley.

A: The highest temperature in the continent of Asia (54.0 C or 129.2 F) was recorded in 1942 at Tirat Zvi kibbutz in the northern Jordan river valley

Problem: Extract the answer to the question from the following context. Question: What is the shape/form of CDs? Context: The Japanese launch was followed in March 1983 by the introduction of CD players and discs to Europe and North America (where CBS Records released sixteen titles). This event is often seen as the "Big Bang" of the digital audio revolution. The new audio disc was enthusiastically received, especially in the early-adopting classical music and audiophile communities, and its handling quality received particular praise. As the price of players gradually came down, and with the introduction of the portable Walkman the CD began to gain popularity in the larger popular and rock music markets. The first artist to sell a million copies on CD was Dire Straits, with their 1985 album Brothers in Arms. The first major artist to have his entire catalogue converted to CD was David Bowie, whose 15 studio albums were made available by RCA Records in February 1985, along with four greatest hits albums. In 1988, 400 million CDs were manufactured by 50 pressing plants around the world.

A:
discs