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.

Example Input: proper question: What is not used by any form of invertebrate? 
 disfluent question: What is not used by any form of organism um no invertebrate? 
 context: Pattern recognition receptors are proteins used by nearly all organisms to identify molecules associated with pathogens. Antimicrobial peptides called defensins are an evolutionarily conserved component of the innate immune response found in all animals and plants, and represent the main form of invertebrate systemic immunity. The complement system and phagocytic cells are also used by most forms of invertebrate life. Ribonucleases and the RNA interference pathway are conserved across all eukaryotes, and are thought to play a role in the immune response to viruses.
Example Output: None

Example Input: proper question: What studies use pluton emplacement? 
 disfluent question: #VALUE! 
 context: For many geologic applications, isotope ratios of radioactive elements are measured in minerals that give the amount of time that has passed since a rock passed through its particular closure temperature, the point at which different radiometric isotopes stop diffusing into and out of the crystal lattice. These are used in geochronologic and thermochronologic studies. Common methods include uranium-lead dating, potassium-argon dating, argon-argon dating and uranium-thorium dating. These methods are used for a variety of applications. Dating of lava and volcanic ash layers found within a stratigraphic sequence can provide absolute age data for sedimentary rock units which do not contain radioactive isotopes and calibrate relative dating techniques. These methods can also be used to determine ages of pluton emplacement. Thermochemical techniques can be used to determine temperature profiles within the crust, the uplift of mountain ranges, and paleotopography.
Example Output: None

Example Input: proper question: What is the full name of the ASER? 
 disfluent question: Which is no uh make that what is the full name of the ASER? 
 context: Legally, only non-profit trusts and societies can run schools in India. They will have to satisfy a number of infrastructure and human resource related criteria to get Recognition (a form of license) from the government. Critics of this system point out that this leads to corruption by school inspectors who check compliance and to fewer schools in a country that has the largest adult illiterate population in the world. While official data does not capture the real extent of private schooling in the country, various studies have reported unpopularity of government schools and an increasing number of private schools. The Annual Status of Education Report (ASER), which evaluates learning levels in rural India, has been reporting poorer academic achievement in government schools than in private schools. A key difference between the government and private schools is that the medium of education in private schools is English while it is the local language in government schools.
Example Output:
Annual Status of Education Report