Given the task definition, example input & output, solve the new input case.
Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
Example: In 1582 the united provinces invited francis, duke of anjou to lead them; but after a failed attempt to take antwerp in 1583, the duke left the netherlands again. after the assassination of william of orange (10 july 1584), both henry iii of france and elizabeth i of england declined the offer of sovereignty. however, the latter agreed to turn the united provinces into a protectorate of england (treaty of nonsuch, 1585), and sent the earl of leicester as governor-general. this was unsuccessful and in 1588 the provinces became a confederacy. the union of utrecht is regarded as the foundation of the republic of the seven united provinces, which was not recognized by the spanish empire until the peace of westphalia in 1648.
Output: In what year did francis, duke of anjou leave the netherlands?
The generated question is perfect. Because the question is based on second sentence of the input passage and its answer is 1583.

New input case for you: To define the relationship between body indices of healthy adults and cross-sectional areas of the carpal tunnel and median nerve and to obtain the nerve/tunnel index, which represents a new standard for diagnosing carpal tunnel syndrome using sonography. Body indices (height, weight, and body mass index) were analyzed in 60 healthy adults, and electromyography and sonography were also performed. The cross-sectional areas of the proximal and distal median nerve and carpal tunnel were obtained by sonography. The proximal and distal nerve/tunnel indices were obtained by calculating the ratio between the proximal and distal cross-sectional areas of the median nerve to those of the carpal tunnel and multiplying the value by 100. Although the proximal cross-sectional areas of the median nerve and body indices showed statistically significant relationships with weak positive correlations, the proximal and distal areas of the carpal tunnel showed relatively stronger correlations with body indices. Between sexes, there were significant differences in the proximal median nerve cross-sectional area (mean SD: male, 10.48 3.21 mm(2); female, 8.81 3.21 mm(2); P < .05) and proximal carpal tunnel area (male, 182.50 21.15 mm(2); female, 151.23 21.14 mm(2); P < .05). There was no difference in the proximal nerve/tunnel index (male, 5.80% 1.72%; female, 5.91% 1.63%). There was a statistically significant difference in the distal carpal tunnel cross-sectional area (male, 138.90 20.95 mm(2); female, 121.50 18.99 mm(2); P < .05) between sexes, but the distal median area (male, 9.99 3.42 mm(2); female, 8.46 1.84 mm(2)) and distal nerve/tunnel index (male, 7.15% 2.00%; female, 7.01% 1.38%) showed no significant differences. The proximal index was significantly higher than the distal index (proximal, 5.85% 1.66%; distal, 7.08% 1.71%). The nerve/tunnel index is unaffected by body indices or sex and thus may be a useful and objective standard for diagnosing carpal tunnel syndrome.
Output:
What nerve is involved in carpal tunnel syndrome?