Q: 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: Who wrote the study published in Nature in October 2011?
disfluent question: Who wrote the study published in Haensch, oops I mean, in Nature in October 2011?
context: The results of the Haensch study have since been confirmed and amended. Based on genetic evidence derived from Black Death victims in the East Smithfield burial site in England, Schuenemann et al. concluded in 2011 that the Black Death in medieval Europe was caused by a variant of Y. pestis that may no longer exist. A study published in Nature in October 2011 sequenced the genome of Y. pestis from plague victims and indicated that the strain that caused the Black Death is ancestral to most modern strains of the disease.
A:
None