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.

Ex Input:
proper question: How many types of cilia are there? 
 disfluent question: How many bands err I mean types of cilia are there? 
 context: Ranging from about 1 millimeter (0.039 in) to 1.5 meters (4.9 ft) in size, ctenophores are the largest non-colonial animals that use cilia (hairs) as their main method of locomotion. Most species have eight strips, called comb rows, that run the length of their bodies and bear comb-like bands of cilia, called ctenes, stacked along the comb rows so that when the cilia beat, those of each comb touch the comb below. The name ctenophora means comb-bearing, from the Greek κτείς (stem-form κτεν-) meaning comb and the Greek suffix -φορος meaning carrying.

Ex Output:
None


Ex Input:
proper question: What is an example of a less sophisticated defense mechanism that jawed vertebrates have? 
 disfluent question: Who is or no make what is an example of a less sophisticated defense mechanism that jawed vertebrates have? 
 context: Pathogens can rapidly evolve and adapt, and thereby avoid detection and neutralization by the immune system; however, multiple defense mechanisms have also evolved to recognize and neutralize pathogens. Even simple unicellular organisms such as bacteria possess a rudimentary immune system, in the form of enzymes that protect against bacteriophage infections. Other basic immune mechanisms evolved in ancient eukaryotes and remain in their modern descendants, such as plants and invertebrates. These mechanisms include phagocytosis, antimicrobial peptides called defensins, and the complement system. Jawed vertebrates, including humans, have even more sophisticated defense mechanisms, including the ability to adapt over time to recognize specific pathogens more efficiently. Adaptive (or acquired) immunity creates immunological memory after an initial response to a specific pathogen, leading to an enhanced response to subsequent encounters with that same pathogen. This process of acquired immunity is the basis of vaccination.

Ex Output:
None


Ex Input:
proper question: Why did student applications increase during the 1950s? 
 disfluent question: Why did the university applicants decrease no rather tell me why student applications increased during the 1950s? 
 context: In the early 1950s, student applications declined as a result of increasing crime and poverty in the Hyde Park neighborhood. In response, the university became a major sponsor of a controversial urban renewal project for Hyde Park, which profoundly affected both the neighborhood's architecture and street plan. During this period the university, like Shimer College and 10 others, adopted an early entrant program that allowed very young students to attend college; in addition, students enrolled at Shimer were enabled to transfer automatically to the University of Chicago after their second year, having taken comparable or identical examinations and courses.

Ex Output:

None