Input: Greece
The end of the Dark Ages is traditionally dated to 776 BC, the year of the first Olympic Games. The Iliad and the Odyssey, the foundational texts of Western literature, are believed to have been composed by Homer in the 8th or 7th centuries BC With the end of the Dark Ages, there emerged various kingdoms and city-states across the Greek peninsula, which spread to the shores of the Black Sea, Southern Italy (Latin: Magna Graecia, or Greater Greece) and Asia Minor. These states and their colonies reached great levels of prosperity that resulted in an unprecedented cultural boom, that of classical Greece, expressed in architecture, drama, science, mathematics and philosophy. In 508 BC, Cleisthenes instituted the world's first democratic system of government in Athens.

What year is considered the be the last of the Dark Ages?
Output: 776 BC

Input: Samurai
From 1854, the samurai army and the navy were modernized. A Naval training school was established in Nagasaki in 1855. Naval students were sent to study in Western naval schools for several years, starting a tradition of foreign-educated future leaders, such as Admiral Enomoto. French naval engineers were hired to build naval arsenals, such as Yokosuka and Nagasaki. By the end of the Tokugawa shogunate in 1867, the Japanese navy of the shogun already possessed eight western-style steam warships around the flagship Kaiyo Maru, which were used against pro-imperial forces during the Boshin war, under the command of Admiral Enomoto. A French Military Mission to Japan (1867) was established to help modernize the armies of the Bakufu.

How many steam warships did Japan have in 1867?
Output: eight

Input: Frederic Chopin
The British Library notes that "Chopin's works have been recorded by all the great pianists of the recording era." The earliest recording was an 1895 performance by Paul Pabst of the Nocturne in E major Op. 62 No. 2. The British Library site makes available a number of historic recordings, including some by Alfred Cortot, Ignaz Friedman, Vladimir Horowitz, Benno Moiseiwitsch, Paderewski, Arthur Rubinstein, Xaver Scharwenka and many others. A select discography of recordings of Chopin works by pianists representing the various pedagogic traditions stemming from Chopin is given by Methuen-Campbell in his work tracing the lineage and character of those traditions.

What has stated that every pianist in the recording era has used Chopin's music?
Output: The British Library

Input: Solar energy
Solar distillation can be used to make saline or brackish water potable. The first recorded instance of this was by 16th-century Arab alchemists. A large-scale solar distillation project was first constructed in 1872 in the Chilean mining town of Las Salinas. The plant, which had solar collection area of 4,700 m2 (51,000 sq ft), could produce up to 22,700 L (5,000 imp gal; 6,000 US gal) per day and operate for 40 years. Individual still designs include single-slope, double-slope (or greenhouse type), vertical, conical, inverted absorber, multi-wick, and multiple effect. These stills can operate in passive, active, or hybrid modes. Double-slope stills are the most economical for decentralized domestic purposes, while active multiple effect units are more suitable for large-scale applications.

What is used to make saline or brackish water drinkable?
Output:
Solar distillation