Question: Times of personal significance have included the births and marriages of her children, grandchildren and great grandchildren, her coronation in 1953, and the celebration of milestones such as her Silver, Golden and Diamond Jubilees in 1977, 2002, and 2012, respectively. Moments of sadness for her include the death of her father, aged 56; the assassination of Prince Philip's uncle, Lord Mountbatten; the breakdown of her children's marriages in 1992 (her annus horribilis); the death in 1997 of her son's former wife, Diana, Princess of Wales; and the deaths of her mother and sister in 2002. Elizabeth has occasionally faced republican sentiments and severe press criticism of the royal family, but support for the monarchy and her personal popularity remain high.
Is there an answer to this question: In what year did Diana, Princess of Wales, marry Elizabeth's son?

Answer: unanswerable

Question: In the late eighteenth- and early nineteenth-century Germany, three pioneer physical educators Johann Friedrich GutsMuths (17591839) and Friedrich Ludwig Jahn (17781852) created exercises for boys and young men on apparatus they had designed that ultimately led to what is considered modern gymnastics. Don Francisco Amoros y Ondeano, was born on February 19, 1770 in Valence and died on August 8, 1848 in Paris. He was a Spanish colonel, and the first person to introduce educative gymnastic in France. Jahn promoted the use of parallel bars, rings and high bar in international competition.
Is there an answer to this question: What did Jahn promote the use of?

Answer: parallel bars, rings and high bar

Question: Roncalli was elected pope on 28 October 1958 at age 76 after 11 ballots. His selection was unexpected, and Roncalli himself had come to Rome with a return train ticket to Venice. He was the first pope to take the pontifical name of "John" upon election in more than 500 years, and his choice settled the complicated question of official numbering attached to this papal name due to the antipope of this name. Pope John XXIII surprised those who expected him to be a caretaker pope by calling the historic Second Vatican Council (196265), the first session opening on 11 October 1962. His passionate views on equality were summed up in his famous statement, "We were all made in God's image, and thus, we are all Godly alike." John XXIII made many passionate speeches during his pontificate, one of which was on the day that he opened the Second Vatican Council in the middle of the night to the crowd gathered in St. Peter's Square: "Dear children, returning home, you will find children: give your children a hug and say: This is a hug from the Pope!"
Is there an answer to this question: When was Roncalli elected pope?

Answer: 28 October 1958

Question: The logical format of an audio CD (officially Compact Disc Digital Audio or CD-DA) is described in a document produced in 1980 by the format's joint creators, Sony and Philips. The document is known colloquially as the Red Book CD-DA after the colour of its cover. The format is a two-channel 16-bit PCM encoding at a 44.1 kHz sampling rate per channel. Four-channel sound was to be an allowable option within the Red Book format, but has never been implemented. Monaural audio has no existing standard on a Red Book CD; thus, mono source material is usually presented as two identical channels in a standard Red Book stereo track (i.e., mirrored mono); an MP3 CD, however, can have audio file formats with mono sound.
Is there an answer to this question: Do CDs have a two or four channel format?

Answer:
two-channel