Problem: Immunology is a branch of biomedical science that covers the study of immune systems in all organisms. It charts, measures, and contextualizes the: physiological functioning of the immune system in states of both health and diseases; malfunctions of the immune system in immunological disorders (such as autoimmune diseases, hypersensitivities, immune deficiency, and transplant rejection); the physical, chemical and physiological characteristics of the components of the immune system in vitro, in situ, and in vivo. Immunology has applications in numerous disciplines of medicine, particularly in the fields of organ transplantation, oncology, virology, bacteriology, parasitology, psychiatry, and dermatology.
In general, what does immunology study?
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Answer: immune systems in all organisms


Problem: In 1943, Barcelona faced rivals Real Madrid in the semi-finals of Copa del Generalísimo (now the Copa del Rey). The first match at Les Corts was won by Barcelona 3–0. Real Madrid comfortably won the second leg, beating Barcelona 11–1. According to football writer Sid Lowe, "There have been relatively few mentions of the game [since] and it is not a result that has been particularly celebrated in Madrid. Indeed, the 11–1 occupies a far more prominent place in Barcelona's history." It has been alleged by local journalist Paco Aguilar that Barcelona's players were threatened by police in the changing room, though nothing was ever proven.
Who is rumored to have threatened Barcelona players before the match against Real Madrid?
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Answer: police


Problem: Furthermore, evidence exists that hunting may have been one of the multiple environmental factors leading to extinctions of the holocene megafauna and their replacement by smaller herbivores. North American megafauna extinction was coincidental with the Younger Dryas impact event, possibly making hunting a less critical factor in prehistoric species loss than had been previously thought. However, in other locations such as Australia, humans are thought to have played a very significant role in the extinction of the Australian megafauna that was widespread prior to human occupation.
What event was coincidental with the North American megafauna extinction? 
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Answer:
Younger Dryas impact event