TASK DEFINITION: Use a disfluent question or a proper question and find the answer to the question based on the given context or return None if an answer can't be found. A disfluent question is a question that has some interruptions in it while framing. A proper question is the correct form of the question without any disfluency.
PROBLEM: proper question: Originally built with four layers, how many layers did DEC evolve to have? 
 disfluent question: Originally built with four layers, what protocols no I mean how many layers did DEC evolve to have? 
 context: DECnet is a suite of network protocols created by Digital Equipment Corporation, originally released in 1975 in order to connect two PDP-11 minicomputers. It evolved into one of the first peer-to-peer network architectures, thus transforming DEC into a networking powerhouse in the 1980s. Initially built with three layers, it later (1982) evolved into a seven-layer OSI-compliant networking protocol. The DECnet protocols were designed entirely by Digital Equipment Corporation. However, DECnet Phase II (and later) were open standards with published specifications, and several implementations were developed outside DEC, including one for Linux.

SOLUTION: None

PROBLEM: proper question: Why has the Rhine been shortened? 
 disfluent question: Where does um wait why has the Rhine been shortened? 
 context: The length of the Rhine is conventionally measured in Rhine-kilometers (Rheinkilometer), a scale introduced in 1939 which runs from the Old Rhine Bridge at Constance (0 km) to Hoek van Holland (1036.20 km). The river length is significantly shortened from the river's natural course due to number of canalisation projects completed in the 19th and 20th century.[note 7] The total length of the Rhine, to the inclusion of Lake Constance and the Alpine Rhine is more difficult to measure objectively; it was cited as 1,232 kilometres (766 miles) by the Dutch Rijkswaterstaat in 2010.[note 1]

SOLUTION: from the river's natural course due to number of canalisation projects completed in the 19th and 20th century

PROBLEM: proper question: Who besides the british colonized Asia? 
 disfluent question: What did or tell me who besides the british colonized Asia? 
 context: To better illustrate this idea, Bassett focuses his analysis of the role of nineteenth-century maps during the scramble for Africa. He states that maps contributed to empire by promoting, assisting, and legitimizing the extension of French and British power into West Africa. During his analysis of nineteenth-century cartographic techniques, he highlights the use of blank space to denote unknown or unexplored territory. This provided incentives for imperial and colonial powers to obtain information to fill in blank spaces on contemporary maps.

SOLUTION:
None