Input: Read this: Napoleon institutionalised plunder of conquered territories: French museums contain art stolen by Napoleon's forces from across Europe. Artefacts were brought to the Musée du Louvre for a grand central museum; his example would later serve as inspiration for more notorious imitators. He was compared to Adolf Hitler most famously by the historian Pieter Geyl in 1947 and Claude Ribbe in 2005. David G. Chandler, a foremost historian of Napoleonic warfare, wrote in 1973 that, "Nothing could be more degrading to the former [Napoleon] and more flattering to the latter [Hitler]. The comparison is odious. On the whole Napoleon was inspired by a noble dream, wholly dissimilar from Hitler's... Napoleon left great and lasting testimonies to his genius—in codes of law and national identities which survive to the present day. Adolf Hitler left nothing but destruction."
Question: Who compared Napoleon to Hitler in 1947?

Output: Pieter Geyl


Input: Read this: The Cenozoic Era covers the 66 million years since the Cretaceous–Paleogene extinction event up to and including the present day. By the end of the Mesozoic era, the continents had rifted into nearly their present form. Laurasia became North America and Eurasia, while Gondwana split into South America, Africa, Australia, Antarctica and the Indian subcontinent, which collided with the Asian plate. This impact gave rise to the Himalayas. The Tethys Sea, which had separated the northern continents from Africa and India, began to close up, forming the Mediterranean sea.
Question: What sea opened near Africa?

Output: unanswerable


Input: Read this: The neopositivists subscribed to a notion of philosophy as the conceptual clarification of the methods, insights and discoveries of the sciences. They saw in the logical symbolism elaborated by Frege (1848–1925) and Bertrand Russell (1872–1970) a powerful instrument that could rationally reconstruct all scientific discourse into an ideal, logically perfect, language that would be free of the ambiguities and deformations of natural language. This gave rise to what they saw as metaphysical pseudoproblems and other conceptual confusions. By combining Frege's thesis that all mathematical truths are logical with the early Wittgenstein's idea that all logical truths are mere linguistic tautologies, they arrived at a twofold classification of all propositions: the analytic (a priori) and the synthetic (a posteriori). On this basis, they formulated a strong principle of demarcation between sentences that have sense and those that do not: the so-called verification principle. Any sentence that is not purely logical, or is unverifiable is devoid of meaning. As a result, most metaphysical, ethical, aesthetic and other traditional philosophical problems came to be considered pseudoproblems.
Question: When did Wittgenstein die?

Output: unanswerable


Input: Read this: For those with severe persistent asthma not controlled by inhaled corticosteroids and LABAs, bronchial thermoplasty may be an option. It involves the delivery of controlled thermal energy to the airway wall during a series of bronchoscopies. While it may increase exacerbation frequency in the first few months it appears to decrease the subsequent rate. Effects beyond one year are unknown. Evidence suggests that sublingual immunotherapy in those with both allergic rhinitis and asthma improve outcomes.
Question: What effect does bronchial thermoplasty have?

Output:
it appears to decrease the subsequent rate.