Input: Read this: It was principally the widespread introduction of a single feature, the pointed arch, which was to bring about the change that separates Gothic from Romanesque. The technological change permitted a stylistic change which broke the tradition of massive masonry and solid walls penetrated by small openings, replacing it with a style where light appears to triumph over substance. With its use came the development of many other architectural devices, previously put to the test in scattered buildings and then called into service to meet the structural, aesthetic and ideological needs of the new style. These include the flying buttresses, pinnacles and traceried windows which typify Gothic ecclesiastical architecture. But while pointed arch is so strongly associated with the Gothic style, it was first used in Western architecture in buildings that were in other ways clearly Romanesque, notably Durham Cathedral in the north of England, Monreale Cathedral and Cathedral of Cefalu in Sicily, Autun Cathedral in France.
Question: What is another example of a Gothic style element that was able to be forgotten because of technological innovation?

Output: unanswerable

Input: Read this: Half the deported perished, and the other half were not allowed to return until the early 1960s (years after Stalin's death).[citation needed] The activities of Soviet forces in 194041 and after reoccupation sparked a guerrilla war against Soviet authorities in Estonia by the Forest Brothers, who consisted mostly of Estonian veterans of the German and Finnish armies and some civilians. This conflict continued into the early 1950s. Material damage caused by the world war and the following Soviet era significantly slowed Estonia's economic growth, resulting in a wide wealth gap in comparison with neighbouring Finland and Sweden.
Question: What event led to the return of Estonians back home?

Output: Stalin's death

Input: Read this: On an international level the German DIN 4512 system has been effectively superseded in the 1980s by ISO 6:1974, ISO 2240:1982, and ISO 5800:1979 where the same sensitivity is written in linear and logarithmic form as "ISO 100/21" (now again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.
Question: When did the ISO adopt the DIN standards?

Output: unanswerable

Input: Read this: The AVL, created by the Valencian parliament, is in charge of dictating the official rules governing the use of Valencian, and its standard is based on the Norms of Castello (Normes de Castello). Currently, everyone who writes in Valencian uses this standard, except the Royal Academy of Valencian Culture (Academia de Cultura Valenciana, RACV), which uses for Valencian an independent standard.
Question: Who established the AVL?

Output:
Valencian parliament