Input: Read this: For the popular taste however, light music, particularly Ghazals and folk songs, which have an appeal of their own, the names of Mehdi Hassan, Ghulam Ali, Nur Jehan, Malika Pukhraj, Farida Khanum, Roshen Ara Begum, and Nusrat Fateh Ali Khan are well-known. Folk songs and dances of the Punjab reflect a wide range of moods: the rains, sowing and harvesting seasons. Luddi, Bhangra and Sammi depict the joy of living. Love legends of Heer Ranjha, Mirza Sahiban, Sohni Mahenwal and Saiful Mulk are sung in different styles.
Question: Who wrote songs after the style of Sammi?

Output: unanswerable

Input: Read this: Zinc serves a purely structural role in zinc fingers, twists and clusters. Zinc fingers form parts of some transcription factors, which are proteins that recognize DNA base sequences during the replication and transcription of DNA. Each of the nine or ten Zn2+ ions in a zinc finger helps maintain the finger's structure by coordinately binding to four amino acids in the transcription factor. The transcription factor wraps around the DNA helix and uses its fingers to accurately bind to the DNA sequence.
Question: What proteins during replication and transcription of DNA forget base DNA?

Output: unanswerable

Input: Read this: The stagnation and decline, Stephen Lee argues, was relentless after the death of Suleiman in 1566, interrupted by a few short revivals or reform and recovery. The decline gathered speed so that the Empire in 1699 was, "a mere shadow of that which intimidated East and West alike in 1566." Although there are dissenting scholars, most historians point to "degenerate Sultans, incompetent Grand Viziers, debilitated and ill-equipped armies, corrupt officials, avaricious speculators, grasping enemies, and treacherous friends." The main cause was a failure of leadership, as Lee argues the first 10 sultans from 1292 to 1566, with one exception, had performed admirably. The next 13 sultans from 1566 to 1703, with two exceptions, were lackadaisical or incompetent rulers, says Lee. In a highly centralized system, the failure at the center proved fatal. A direct result was the strengthening of provincial elites who increasingly ignored Constantinople. Secondly the military strength of European enemies grew stronger and stronger, while the Ottoman armies and arms scarcely improved. Finally the Ottoman economic system grew distorted and impoverished, as war caused inflation, world trade moved in other directions, and the deterioration of law and order made economic progress difficult.
Question: What factor caused inflation in the Ottoman empire?

Output: war

Input: Read this: In the last two decades, photovoltaics (PV), also known as solar PV, has evolved from a pure niche market of small scale applications towards becoming a mainstream electricity source. A solar cell is a device that converts light directly into electricity using the photoelectric effect. The first solar cell was constructed by Charles Fritts in the 1880s. In 1931 a German engineer, Dr Bruno Lange, developed a photo cell using silver selenide in place of copper oxide. Although the prototype selenium cells converted less than 1% of incident light into electricity, both Ernst Werner von Siemens and James Clerk Maxwell recognized the importance of this discovery. Following the work of Russell Ohl in the 1940s, researchers Gerald Pearson, Calvin Fuller and Daryl Chapin created the crystalline silicon solar cell in 1954. These early solar cells cost 286 USD/watt and reached efficiencies of 4.56%. By 2012 available efficiencies exceed 20% and the maximum efficiency of research photovoltaics is over 40%.
Question: In what year was the crystalline silicon solar cell constructed?

Output:
1954