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.

proper question: When did the Ottoman Empire fall? 
 disfluent question: When did the reign of Suleiman the Magnificent no um Ottoman Empire fall? 
 context: The Ottoman Empire was an imperial state that lasted from 1299 to 1923. During the 16th and 17th centuries, in particular at the height of its power under the reign of Suleiman the Magnificent, the Ottoman Empire was a powerful multinational, multilingual empire controlling much of Southeast Europe, Western Asia, the Caucasus, North Africa, and the Horn of Africa. At the beginning of the 17th century the empire contained 32 provinces and numerous vassal states. Some of these were later absorbed into the empire, while others were granted various types of autonomy during the course of centuries.
1923

proper question: Where is the aboral organ located? 
 disfluent question: What is no Where is the aboral organ located? 
 context: The largest single sensory feature is the aboral organ (at the opposite end from the mouth). Its main component is a statocyst, a balance sensor consisting of a statolith, a solid particle supported on four bundles of cilia, called balancers, that sense its orientation. The statocyst is protected by a transparent dome made of long, immobile cilia. A ctenophore does not automatically try to keep the statolith resting equally on all the balancers. Instead its response is determined by the animal's mood, in other words the overall state of the nervous system. For example, if a ctenophore with trailing tentacles captures prey, it will often put some comb rows into reverse, spinning the mouth towards the prey.
at the opposite end from the mouth

proper question: How many stories doe the Lavietes Pavillion have? 
 disfluent question: How many rooms ah I mean stories doe the Lavietes Pavillion have? 
 context: Harvard has several athletic facilities, such as the Lavietes Pavilion, a multi-purpose arena and home to the Harvard basketball teams. The Malkin Athletic Center, known as the MAC, serves both as the university's primary recreation facility and as a satellite location for several varsity sports. The five-story building includes two cardio rooms, an Olympic-size swimming pool, a smaller pool for aquaerobics and other activities, a mezzanine, where all types of classes are held, an indoor cycling studio, three weight rooms, and a three-court gym floor to play basketball. The MAC offers personal trainers and specialty classes. It is home to Harvard volleyball, fencing and wrestling. The offices of several of the school's varsity coaches are also in the MAC.

None