Input: Read this: The marine life found here consists of anemones, urchins, sea cucumbers, and eels, which all live on the reefs along with turtles, conch and many varieties of marine fishes. The marine aquafauna is rich in conch, which has pearly-pink shells. Its meat is a favourite food supplement item and their shells are a collectors item. Other species of fish which are recorded close to the shore line in shallow waters are: sergeant majors, the blue chromis, brown chromis, surgeon fish; blue tangs and trumpet fish. On the shore are ghost crabs, which always live on the beach in small burrowed tunnels made in sand, and the hermit crabs, which live in land but lay eggs in water and which also eat garbage and sewerage. They spend some months in the sea during and after the hatching season.
Question: What do ghost crabs eat?

Output: unanswerable


Input: Read this: The Masonic Lodge is the basic organisational unit of Freemasonry. The Lodge meets regularly to conduct the usual formal business of any small organisation (pay bills, organise social and charitable events, elect new members, etc.). In addition to business, the meeting may perform a ceremony to confer a Masonic degree or receive a lecture, which is usually on some aspect of Masonic history or ritual. At the conclusion of the meeting, the Lodge might adjourn for a formal dinner, or festive board, sometimes involving toasting and song.
Question: What is the complex organizational unit of Freemasonry?

Output: unanswerable


Input: Read this: 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%.
Question: What percentage of women in South Asia have blue or green eyes?

Output: unanswerable


Input: Read this: The city was also home to the Royal Naval Engineering College; opened in 1880 in Keyham, it trained engineering students for five years before they completed the remaining two years of the course at Greenwich. The college closed in 1910, but in 1940 a new college opened at Manadon. This was renamed Dockyard Technical College in 1959 before finally closing in 1994; training was transferred to the University of Southampton.
Question: When did the Royal Naval Engineering College shut its doors in Plymouth?

Output:
1910