This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

Example Input: Its knowledge and uses spread from China through the Middle East to medieval Europe in the 13th century, where the first water powered paper mills were built. Because of paper's introduction to the West through the city of Baghdad, it was first called bagdatikos. In the 19th century, industrial manufacture greatly lowered its cost, enabling mass exchange of information and contributing to significant cultural shifts. In 1844, the Canadian inventor Charles Fenerty and the German F. G. Keller independently developed processes for pulping wood fibres.
Example Output: In what century did the papermaking process spread from China to Europe?

Example Input: However a log-periodic dipole array consists of a number of dipole elements of different lengths in order to obtain a somewhat directional antenna having an extremely wide bandwidth: these are frequently used for television reception in fringe areas. The dipole antennas composing it are all considered "active elements" since they are all electrically connected together (and to the transmission line). On the other hand, a superficially similar dipole array, the Yagi-Uda Antenna (or simply "Yagi"), has only one dipole element with an electrical connection; the other so-called parasitic elements interact with the electromagnetic field in order to realize a fairly directional antenna but one which is limited to a rather narrow bandwidth. The Yagi antenna has similar looking parasitic dipole elements but which act differently due to their somewhat different lengths. There may be a number of so-called "directors" in front of the active element in the direction of propagation, and usually a single (but possibly more) "reflector" on the opposite side of the active element.
Example Output: What type of antenna formation is made up of multiple dipole elements of varying lengths?

Example Input: The Parish Church of St Andrew is traditionally recognised as 'the oldest church in this town'. The present building was begun in the 12th Century and the last addition to it, apart from the vestries, was the main porch in 1726. It is quite possible that there was an earlier church here dating from Saxon times. This older church would have been one of several churches along the River Tyne dedicated to St Andrew, including the Priory church at Hexham. The building contains more old stonework than any other church in Newcastle. It is surrounded by the last of the ancient churchyards to retain its original character. Many key names associated with Newcastle's history worshipped and were buried here. The church tower received a battering during the Siege of Newcastle by the Scots who finally breached the Town Wall and forced surrender. Three of the cannonballs remain on site as testament to the siege.
Example Output:
Which parish church in Newcastle is typically agreed to be the oldest one in town?