Question: Being a city on the Ill and close to the Rhine, Strasbourg has always been an important centre of fluvial navigation, as is attested by archeological findings. In 1682 the Canal de la Bruche was added to the river navigations, initially to provide transport for sandstone from quarries in the Vosges for use in the fortification of the city. That canal has since closed, but the subsequent Canal du Rhone au Rhine, Canal de la Marne au Rhin and Grand Canal d'Alsace are still in use, as is the important activity of the Port autonome de Strasbourg. Water tourism inside the city proper attracts hundreds of thousands of tourists yearly.
Is there an answer to this question: In what year was the Canal du Rhone au Rhine opened?

Answer: unanswerable

Question: Melbourne has a temperate oceanic climate (Koppen climate classification Cfb) and is well known for its changeable weather conditions. This is mainly due to Melbourne's location situated on the boundary of the very hot inland areas and the cool southern ocean. This temperature differential is most pronounced in the spring and summer months and can cause very strong cold fronts to form. These cold fronts can be responsible for all sorts of severe weather from gales to severe thunderstorms and hail, large temperature drops, and heavy rain.
Is there an answer to this question: During which seasons are Melbourne's temperature differentials most pronounced?

Answer: spring and summer

Question: On an international level the German DIN 4512 system has been effectively superseded in the 1980s by ISO 6:1974, ISO 2240:1982, and ISO 5800:1979 where the same sensitivity is written in linear and logarithmic form as "ISO 100/21" (now again with degree symbol). These ISO standards were subsequently adopted by DIN as well. Finally, the latest DIN 4512 revisions were replaced by corresponding ISO standards, DIN 4512-1:1993-05 by DIN ISO 6:1996-02 in September 2000, DIN 4512-4:1985-08 by DIN ISO 2240:1998-06 and DIN 4512-5:1990-11 by DIN ISO 5800:1998-06 both in July 2002.
Is there an answer to this question: What did the German DIN 4512 supersede?

Answer: unanswerable

Question: On August 5, 2008, SCA and Bertelsmann announced that Sony had agreed to acquire Bertelsmann's 50% stake in Sony BMG. Sony completed its acquisition of Bertelsmann's 50% stake in the companies' joint venture on October 1, 2008. The company, once again named Sony Music Entertainment Inc., became a wholly owned subsidiary of Sony Corporation through its US subsidiary SCA. The last few albums to feature a Sony BMG logo were Thriller 25 by Michael Jackson, I Am... Sasha Fierce by Beyonce, Keeps Gettin' Better: A Decade of Hits by Christina Aguilera, and Safe Trip Home by Dido. A temporary logo was unveiled beginning December 1, 2008. The present logo was unveiled in March 2009.
Is there an answer to this question: Bertelsmann acquired Sony's 50% stake on what date?

Answer:
unanswerable