Input: Read this: Until roughly the 16th century, speakers of all the varieties of the West Germanic languages from the mouth of the Rhine to the Alps had been accustomed to refer to their native speech as Dietsch, (Neder)duyts or some other cognate of theudisk. This let inevitably to confusion since similar terms referred to different languages. Therefore, in the 16th century, a differentiation took place. Owing to Dutch commercial and colonial rivalry in the 16th and 17th centuries, the English term came to refer exclusively to the Dutch. A notable exception is Pennsylvania Dutch, which is a West Central German variety called Deitsch by its speakers. Jersey Dutch, on the other hand, as spoken until the 1950s in New Jersey, is a Dutch-based creole.
Question: In what century was a differentiation made to clear up confusion about West Germanic languages?

Output: 16th

Input: Read this: In South Australia, initially a Liberal and Country Party affiliated party, the Liberal and Country League (LCL), mostly led by Premier of South Australia Tom Playford, was in power from the 1933 election to the 1965 election, though with assistance from an electoral malapportionment, or gerrymander, known as the Playmander. The LCL's Steele Hall governed for one term from the 1968 election to the 1970 election and during this time began the process of dismantling the Playmander. David Tonkin, as leader of the South Australian Division of the Liberal Party of Australia, became Premier at the 1979 election for one term, losing office at the 1982 election. The Liberals returned to power at the 1993 election, led by Premiers Dean Brown, John Olsen and Rob Kerin through two terms, until their defeat at the 2002 election. They have since remained in opposition under a record five Opposition Leaders.
Question: How long was Dean Brown in power?

Output: unanswerable

Input: Read this: In 677 (during the reign of Emperor Gaozong), Chen Zheng (), together with his son Chen Yuanguang (), led a military expedition to pacify the rebellion in Fujian. They settled in Zhangzhou and brought the Middle Chinese phonology of northern China during the 7th century into Zhangzhou; In 885, (during the reign of Emperor Xizong of Tang), the two brothers Wang Chao () and Wang Shenzhi (), led a military expedition force to pacify the Huang Chao rebellion. They brought the Middle Chinese phonology commonly spoken in Northern China into Zhangzhou. These two waves of migrations from the north generally brought the language of northern Middle Chinese into the Fujian region. This then gradually evolved into the Zhangzhou dialect.
Question: Who led waves of migrations during the reign of Emperor Gaozong?

Output: unanswerable

Input: Read this: IBM also had their own DBMS in 1966, known as Information Management System (IMS). IMS was a development of software written for the Apollo program on the System/360. IMS was generally similar in concept to CODASYL, but used a strict hierarchy for its model of data navigation instead of CODASYL's network model. Both concepts later became known as navigational databases due to the way data was accessed, and Bachman's 1973 Turing Award presentation was The Programmer as Navigator. IMS is classified[by whom?] as a hierarchical database. IDMS and Cincom Systems' TOTAL database are classified as network databases. IMS remains in use as of 2014[update].
Question: What is the classification of IMS?

Output:
hierarchical database