Problem: I know that the answer to the question "What is a popular piece of classical music that is also the name of a hotel?" is in "Similarly, movies and television often revert to standard, cliched snatches of classical music to convey refinement or opulence: some of the most-often heard pieces in this category include Bach's Cello Suite No. 1, Mozart's Eine kleine Nachtmusik, Vivaldi's Four Seasons, Mussorgsky's Night on Bald Mountain (as orchestrated by Rimsky-Korsakov), and Rossini's William Tell Overture.". Can you tell me what it is?

A: Four Seasons

Problem: I know that the answer to the question "Which eras has Egypt seen?" is in "Egypt has one of the oldest civilisations in the world. It has been in contact with many other civilisations and nations and has been through so many eras, starting from prehistoric age to the modern age, passing through so many ages such as; Pharonic, Roman, Greek, Islamic and many other ages. Because of this wide variation of ages, the continuous contact with other nations and the big number of conflicts Egypt had been through, at least 60 museums may be found in Egypt, mainly covering a wide area of these ages and conflicts.". Can you tell me what it is?

A: prehistoric age to the modern age, passing through so many ages such as; Pharonic, Roman, Greek, Islamic and many other ages

Problem: I know that the answer to the question "What does pitch characterize?" is in "It is still possible for two sounds of indefinite pitch to clearly be higher or lower than one another. For instance, a snare drum sounds higher pitched than a bass drum though both have indefinite pitch, because its sound contains higher frequencies. In other words, it is possible and often easy to roughly discern the relative pitches of two sounds of indefinite pitch, but sounds of indefinite pitch do not neatly correspond to any specific pitch. A special type of pitch often occurs in free nature when sound reaches the ear of an observer directly from the source, and also after reflecting off a sound-reflecting surface. This phenomenon is called repetition pitch, because the addition of a true repetition of the original sound to itself is the basic prerequisite.". Can you tell me what it is?

A: sounds

Problem: I know that the answer to the question "Darwin's aim was?" is in "Darwin's aims were twofold: to show that species had not been separately created, and to show that natural selection had been the chief agent of change. He knew that his readers were already familiar with the concept of transmutation of species from Vestiges, and his introduction ridicules that work as failing to provide a viable mechanism. Therefore, the first four chapters lay out his case that selection in nature, caused by the struggle for existence, is analogous to the selection of variations under domestication, and that the accumulation of adaptive variations provides a scientifically testable mechanism for evolutionary speciation.". Can you tell me what it is?

A:
twofold