In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.

Passage: The highway begins at Highway 28 in western Scott County within the Ouachita Mountains. Highway 28 runs southeast to Waldron, where it has a junction with US Highway 71 (US 71) on the city's west side. After this intersection, Highway 80 continues due east as a section line road and major east–west route in the city. An intersection with US Highway 71 Business (US 71B) just south of downtown Waldron gives access to the primary commercial areas of Waldron. Continuing east, the highway serves as the western terminus for Highway 248 just south of the Poteau River near the eastern city limits of Waldron. Just east of this junction, Highway 80 passes the Poteau Work Center owned and operated by the United States Forest Service. East of Waldron, Highway 80 enters the Ouachita National Forest, a dense pine and cypress forest. The route winds through the forest, serving as the eastern terminus of Highway 250 before entering Yell County.
 Link Information: Waldron is a city in Scott County, Arkansas, United States. Its population was 3,618 Answer: 3,618 
What is the current population of the town where Highway 28 has a junction with US Highway 71?

Passage: The keel for Wacht was laid down in August 1886 at the AG Weser shipyard in Bremen. She was launched on 27 August 1887 and Vizeadmiral (Vice Admiral) Alexander von Monts, the chief of the Marinestation der Nordsee (North Sea Naval Station) christened the ship. In early 1888, she was transferred to Wilhelmshaven, where her armament was installed, and she was commissioned on 9 August to begin sea trials. These concluded on 13 December in Wilhelmshaven. She was temporarily assigned to the newly-created Reserve Division of the North Sea over the winter of 1888–1889 before being transferred to Kiel on 1 May to begin engine trials, after which she was assigned to the Maneuver Squadron. During training exercises with the squadron, Wacht suffered a burst boiler tube on 20 June that forced her to return to port for repairs. In early August, she joined the squadron for a visit to Britain, arriving back in Wilhelmshaven on 31 August. The fleet then conducted its annual large-scale maneuvers. After the maneuvers ended in September, Korvettenkapitän (KK—Corvette Captain) Friedrich von Baudissin took command of the vessel. 
 Link Information: Bremen is a major cultural and economic hub of Northern Germany. Answer: Germany
In what country was the keel for the Wacht laid down?

Passage: Barschall was born as Heinrich Hermann Barschall in Berlin, Germany; his father was a patent attorney who had received a Ph.D. in chemistry after studying with Nobel Laureates Emil Fischer and Fritz Haber. After beginning study in several universities in Germany, he emigrated to the United States in 1937 during the early Holocaust period; though raised as a Lutheran, he had some Jewish ancestry. He received his Ph.D. from Princeton University in 1940 under the direction of Rudolf Ladenburg; he also worked closely with John A. Wheeler. After a suggestion by Niels Bohr, he carried out in only a few days with fellow graduate student Morton H. Kanner the first demonstration of fission by fast neutrons and thorium and uranium. His thesis was on the interaction of fast neutrons with helium. In a paper with John A. Wheeler he reported the discovery of spin-orbit coupling in neutron scattering.
 Link Information: none Answer: none

How many people lived in the United States the year that Barschall emigrated to the country?