Extract the answer to the question from the following context. Question: What was an indication of the time period of the standards? Context: In 1925, 78.26 rpm was chosen as the standard because of the introduction of the electrically powered synchronous turntable motor. This motor ran at 3600 rpm, such that a 46:1 gear ratio would produce 78.26 rpm. In parts of the world that used 50 Hz current, the standard was 77.92 rpm (3,000 rpm with a 77:2 ratio), which was also the speed at which a strobe disc with 77 lines would "stand still" in 50 Hz light (92 lines for 60 Hz). After World War II these records were retroactively known as 78s, to distinguish them from other newer disc record formats. Earlier they were just called records, or when there was a need to distinguish them from cylinders, disc records.
Ans: After World War II these records were retroactively known as 78s

Extract the answer to the question from the following context. Question: Why are registers used instead of frequently accessing main memory? Context: The CPU contains a special set of memory cells called registers that can be read and written to much more rapidly than the main memory area. There are typically between two and one hundred registers depending on the type of CPU. Registers are used for the most frequently needed data items to avoid having to access main memory every time data is needed. As data is constantly being worked on, reducing the need to access main memory (which is often slow compared to the ALU and control units) greatly increases the computer's speed.
Ans: increases the computer's speed

Extract the answer to the question from the following context. Question: What is a food desert? Context: These statistics point to the complexities surrounding the lack of health/nutrition literacy and reveal the degree to which they are embedded in the social structure and interconnected with other problems. Among these problems are the lack of information about food choices, a lack of understanding of nutritional information and its application to individual circumstances, limited or difficult access to healthful foods, and a range of cultural influences and socioeconomic constraints such as low levels of education and high levels of poverty that decrease opportunities for healthful eating and living.
Ans: limited or difficult access to healthful foods

Extract the answer to the question from the following context. Question: what is the name of the second to last song mentioned? Context: Her tenth studio album, Confessions on a Dance Floor, was released in November 2005. Musically the album was structured like a club set composed by a DJ. It was acclaimed by critics, with Keith Caulfield from Billboard commenting that the album was a "welcome return to form for the Queen of Pop." The album won a Grammy Award for Best Electronic/Dance Album. Confessions on a Dance Floor and its lead single, "Hung Up", went on to reach number one in 40 and 41 countries respectively, earning a place in Guinness World Records. The song contained a sample of ABBA's "Gimme! Gimme! Gimme! (A Man After Midnight)", only the second time that ABBA has allowed their work to be used. ABBA songwriter Bjorn Ulvaeus remarked "It is a wonderful track100 per cent solid pop music." "Sorry", the second single, became Madonna's twelfth number-one single in the UK.
Ans: "Gimme! Gimme! Gimme! (A Man After Midnight)"