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Consequently, steam reforming typically employs an excess of H
2O. Additional hydrogen can be recovered from the steam by use of carbon monoxide through the water gas shift reaction, especially with an iron oxide catalyst. This reaction is also a common industrial source of carbon dioxide:
How can it be recovered through steam?
A: use of carbon monoxide through the water gas shift reaction

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In Paris, Chopin encountered artists and other distinguished figures, and found many opportunities to exercise his talents and achieve celebrity. During his years in Paris he was to become acquainted with, among many others, Hector Berlioz, Franz Liszt, Ferdinand Hiller, Heinrich Heine, Eugène Delacroix, and Alfred de Vigny. Chopin was also acquainted with the poet Adam Mickiewicz, principal of the Polish Literary Society, some of whose verses he set as songs.
Who was the principal of the Polish Literary Society that Frédéric became acquainted with?
A: Adam Mickiewicz

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Frustration with censorship and editorial interference led to a group of Pilote cartoonists to found the adults-only L'Écho des savanes in 1972. Adult-oriented and experimental comics flourished in the 1970s, such as in the experimental science fiction of Mœbius and others in Métal hurlant, even mainstream publishers took to publishing prestige-format adult comics.
When was L'Écho des savanes ended?
A: unanswerable

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On the evening of 12 April 2012, members of the country's military staged a coup d'état and arrested the interim president and a leading presidential candidate. Former vice chief of staff, General Mamadu Ture Kuruma, assumed control of the country in the transitional period and started negotiations with opposition parties.
Who staged the coup d'etat?
A:
members of the country's military