TASK DEFINITION: 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.
PROBLEM: 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.

SOLUTION: What type of antenna formation is made up of multiple dipole elements of varying lengths?

PROBLEM: In 1914, advertising executive Albert Lasker obtained a large block of the club's shares and before the 1916 season assumed majority ownership of the franchise. Lasker brought in a wealthy partner, Charles Weeghman, the proprietor of a popular chain of lunch counters who had previously owned the Chicago Whales of the short-lived Federal League. As principal owners, the pair moved the club from the West Side Grounds to the much newer Weeghman Park, which had been constructed for the Whales only two years earlier, where they remain to this day. The Cubs responded by winning a pennant in the war-shortened season of 1918, where they played a part in another team's curse: the Boston Red Sox defeated Grover Cleveland Alexander's Cubs four games to two in the 1918 World Series, Boston's last Series championship until 2004.

SOLUTION: Who obtained a large block of the Cub's shares in 1914?

PROBLEM: After the English Civil War the Royal Citadel was built in 1666 on the east end of Plymouth Hoe, to defend the port from naval attacks, suppress Plymothian Parliamentary leanings and to train the armed forces. Guided tours are available in the summer months. Further west is Smeaton's Tower, which was built in 1759 as a lighthouse on rocks 14 miles (23 km) off shore, but dismantled and the top two thirds rebuilt on the Hoe in 1877. It is open to the public and has views over the Plymouth Sound and the city from the lantern room. Plymouth has 20 war memorials of which nine are on The Hoe including: Plymouth Naval Memorial, to remember those killed in World Wars I and II, and the Armada Memorial, to commemorate the defeat of the Spanish Armada.

SOLUTION:
In what year was the Royal Citadel constructed?