Input: Read this: In the UK, the London, Brighton and South Coast Railway pioneered overhead electrification of its suburban lines in London, London Bridge to Victoria being opened to traffic on 1 December 1909. Victoria to Crystal Palace via Balham and West Norwood opened in May 1911. Peckham Rye to West Norwood opened in June 1912. Further extensions were not made owing to the First World War. Two lines opened in 1925 under the Southern Railway serving Coulsdon North and Sutton railway station. The lines were electrified at 6.7 kV 25 Hz. It was announced in 1926 that all lines were to be converted to DC third rail and the last overhead electric service ran in September 1929.
Question: Peckham Rye to Victoria opened when?

Output: unanswerable


Input: Read this: Popper left school at the age of 16 and attended lectures in mathematics, physics, philosophy, psychology and the history of music as a guest student at the University of Vienna. In 1919, Popper became attracted by Marxism and subsequently joined the Association of Socialist School Students. He also became a member of the Social Democratic Workers' Party of Austria, which was at that time a party that fully adopted the Marxist ideology. After the street battle in the Hörlgasse on 15 June 1919, when police shot eight of his unarmed party comrades, he became disillusioned by what he saw to be the "pseudo-scientific" historical materialism of Marx, abandoned the ideology, and remained a supporter of social liberalism throughout his life.
Question: When did Popper become disillusioned by social liberalism?

Output: unanswerable


Input: Read this: Parque Rodó is both a barrio (neighbourhood) of Montevideo and a park which lies mostly outside the limits of the neighbourhood itself and belongs to Punta Carretas. The name "Rodó" commemorates José Enrique Rodó, an important Uruguayan writer whose monument is in the southern side of the main park. The park was conceived as a French-style city park. Apart from the main park area which is delimited by Sarmiento Avenue to the south, Parque Rodó includes an amusement park; the Estadio Luis Franzini, belonging to Defensor Sporting; the front lawn of the Faculty of Engineering and a strip west of the Club de Golf de Punta Carretas that includes the Canteras ("quarry") del Parque Rodó, the Teatro de Verano ("summer theatre") and the Lago ("lake") del Parque Rodó.
Question: Parque Rodo was originally conceived as what?

Output: a French-style city park


Input: Read this: In certain cases compound words and set phrases may be contracted into single characters. Some of these can be considered logograms, where characters represent whole words rather than syllable-morphemes, though these are generally instead considered ligatures or abbreviations (similar to scribal abbreviations, such as & for "et"), and as non-standard. These do see use, particularly in handwriting or decoration, but also in some cases in print. In Chinese, these ligatures are called héwén (合文), héshū (合書) or hétǐzì (合体字), and in the special case of combining two characters, these are known as "two-syllable Chinese characters" (双音节汉字, 雙音節漢字).
Question: What can be considered as set phrases?

Output:
single characters