Here is a question about this article: There is no green pigment in green eyes; like the color of blue eyes, it is an optical illusion; its appearance is caused by the combination of an amber or light brown pigmentation of the stroma, given by a low or moderate concentration of melanin, with the blue tone imparted by the Rayleigh scattering of the reflected light. Green eyes are most common in Northern and Central Europe. They can also be found in Southern Europe, West Asia, Central Asia, and South Asia. In Iceland, 89% of women and 87% of men have either blue or green eye color. A study of Icelandic and Dutch adults found green eyes to be much more prevalent in women than in men. Among European Americans, green eyes are most common among those of recent Celtic and Germanic ancestry, about 16%.
What is the answer to this question: Where are green eyes most common?
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So... Northern and Central Europe

Here is a question about this article: Plymouth is served by Plymouth Hospitals NHS Trust and the city's NHS hospital is Derriford Hospital 4 miles (6 km) north of the city centre. The Royal Eye Infirmary is located at Derriford Hospital. South Western Ambulance Service NHS Foundation Trust operates in Plymouth and the rest of the south west; its headquarters are in Exeter.
What is the answer to this question: In kilometers, how far is Derriford Hospital from the Plymouth city center?
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So... 6

Here is a question about this article: Before the latter half of the 18th century, grain, timber and then coal were Plymouth's main imports. During this time the real source of wealth was from the neighbouring town of Plymouth Dock (renamed in 1824 to Devonport) and the major employer in the entire region was the dockyard. The Three Towns conurbation of Plymouth, Stonehouse and Devonport enjoyed some prosperity during the late 18th and early 19th century and were enriched by a series of neo-classical urban developments designed by London architect John Foulston. Foulston was important for both Devonport and Plymouth and was responsible for several grand public buildings, many now destroyed, including the Athenaeum, the Theatre Royal and Royal Hotel, and much of Union Street.
What is the answer to this question: Along with coal and grain, what was the most important import in 18th century Plymouth?
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So...
timber