TASK DEFINITION: Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.
PROBLEM: Context: Colonel Muhammadu Abdullahi Wase (died June 1996) was military administrator of Kano State in Nigeria from December 1993 -- 
 Question: Which country is Muhammadu Abdullahi Wase a citizen of?

SOLUTION: nigeria

PROBLEM: Context: Plunkett finished the game with 16 out of 25 pass completions for 172 yards and a touchdown. Theismann threw for more yards than Plunkett (243), but was just 16 out of 35 and was intercepted twice. He was also sacked six times. Branch was the top receiver of the game with six receptions for 94 yards and a touchdown. Guy punted seven times for 299 yards (42.7 average), with 244 net yards (34.8 average) and planted five of his seven punts inside the 20. Martin recorded a sack, a pass deflection, and a fumble recovery. Riggins, who had rushed for over 100 yards in his last six postseason games, was held to 64 yards and a touchdown on 26 carries, with his longest gain being just 8 yards. Brown was their top receiver with three receptions for 93 yards. Tight end Clint Didier caught five passes for 65 yards. Garrett recorded 100 yards on kickoff returns, and one reception for 17 yards. Part of both of Allens touchdown runs were cutbacks, which, according to New York Daily News writer Larry Fox, burned an overpursuing Redskins defense. 
 Question: Which player achieved more receptions, Branch or Brown?

SOLUTION: branch

PROBLEM: Context: MicroRNAs (miRNAs) are a recently discovered group of small RNA molecules involved in the regulation of gene expression. Analogously to mRNAs, the non-protein-encoding pri-miRNAs are synthesized by RNA polymerase II and post-transcriptionally modified by addition of a 5'-cap and a 3'-poly (A) tail. Subsequently, the pri-miRNA undergoes a number of processing steps in the nucleus and cytoplasm, and ends up as a mature approximately 22 nt miRNA, which can exert its function by binding to the 3'-untranslated region of a subset of mRNAs. Binding of the miRNA to the mRNA results in a reduced translation rate and/or increased degradation of the mRNA. In this way a large number of cellular pathways, such as cellular proliferation, differentiation, and apoptosis, are regulated by mi-RNAs. As corruption of these pathways is the hallmark of many cancers, dysregulation of miRNA biogenesis or expression levels may lead to tumorigenesis. The mechanisms that alter the expression of miRNAs are similar to those that change the expression levels of mRNAs of tumor suppressor- and oncogenes, i.e. gross genomic aberrations, epigenetic changes, and minor mutations affecting the expression level, processing, or target-interaction potential of the miRNA. Furthermore, expression profiling of miRNAs has been found to be useful for classification of different tumor types. Taken together, miRNAs can be classified as onco-miRs or tumor suppressor-miRs, and may turn out to be potential targets for cancer therapy. 
 Question: Which polymerase transcribes pri-miRNAs?

SOLUTION:
rnapii