TASK DEFINITION: This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.
PROBLEM: Passage: A series of experiments performed from the late 1800s to the early 1900s revealed that diabetes is caused by the absence of a substance normally produced by the pancreas. In 1869, Oskar Minkowski and Joseph von Mering found that diabetes could be induced in dogs by surgical removal of the pancreas. In 1921, Canadian professor Frederick Banting and his student Charles Best repeated this study, and found that injections of pancreatic extract reversed the symptoms produced by pancreas removal. Soon, the extract was demonstrated to work in people, but development of insulin therapy as a routine medical procedure was delayed by difficulties in producing the material in sufficient quantity and with reproducible purity. The researchers sought assistance from industrial collaborators at Eli Lilly and Co. based on the company's experience with large scale purification of biological materials. Chemist George Walden of Eli Lilly and Company found that careful adjustment of the pH of the extract allowed a relatively pure grade of insulin to be produced. Under pressure from Toronto University and a potential patent challenge by academic scientists who had independently developed a similar purification method, an agreement was reached for non-exclusive production of insulin by multiple companies. Prior to the discovery and widespread availability of insulin therapy the life expectancy of diabetics was only a few months. Question: Who discovered that pancreatic extract reversed symptoms of pancreas removal?

SOLUTION: Frederick Banting and his student Charles Best

PROBLEM: Passage: However questions still remain, as some of the corrupt government officials have still not been brought to justice, while the many families who lost their only child, are still seeking compensation and justice to what had happened. According to the Times, many parents were warned by the government not to stage a protest under the threat of arrest. Question: Who has not been brought to justice?

SOLUTION: corrupt government officials

PROBLEM: Passage: Imperial College Union, the students' union at Imperial College, is run by five full-time sabbatical officers elected from the student body for a tenure of one year, and a number of permanent members of staff. The Union is given a large subvention by the university, much of which is spent on maintaining around 300 clubs, projects and societies. Examples of notable student groups and projects are Project Nepal which sends Imperial College students to work on educational development programmes in rural Nepal and the El Salvador Project, a construction based project in Central America. The Union also hosts sports-related clubs such as Imperial College Boat Club and Imperial College Gliding Club. Question: How many full time officers run the union?

SOLUTION:
five