Input: Bird migration
The timing of migration seems to be controlled primarily by changes in day length. Migrating birds navigate using celestial cues from the sun and stars, the earth's magnetic field, and probably also mental maps.

What causes the timing of migration?
Output: changes in day length

Input: Crimean War
It is often said that Russia was militarily weak, technologically backward, and administratively incompetent. Despite its grand ambitions toward the south, it had not built its railroad network in that direction, and communications were poor. The bureaucracy was riddled with graft, corruption and inefficiency and was unprepared for war. Its navy was weak and technologically backward; its army, although very large, was good only for parades, suffered from colonels who pocketed their men's pay, poor morale, and was out of touch with the latest technology developed by Britain and France. By the war's end, everyone realized the profound weaknesses of the Russian military, and the Russian leadership was determined to reform it.

What did some feel the Russian army was only good for?
Output: parades

Input: Egypt
Misr (IPA: [misr] or Egyptian Arabic pronunciation: [mes]; Arabic: ) is the Classical Quranic Arabic and modern official name of Egypt, while Masr (IPA: [ms]; Egyptian Arabic: ) is the local pronunciation in Egyptian Arabic. The name is of Semitic origin, directly cognate with other Semitic words for Egypt such as the Hebrew (Mitzrayim). The oldest attestation of this name for Egypt is the Akkadian KURmi-is-ru misru, related to misru/misirru/misaru, meaning "border" or "frontier".

What is the oldest term for Egypt?
Output: Akkadian

Input: Samoa
Samoans' religious adherence includes the following: Christian Congregational Church of Samoa 31.8%, Roman Catholic 19.4%, Methodist 15.2%, Assembly of God 13.7%, Mormon 7.6%, Seventh-day Adventist 3.9%, Worship Centre 1.7%, other Christian 5.5%, other 0.7%, none 0.1%, unspecified 0.1% (2011 estimate). The Head of State until 2007, His Highness Malietoa Tanumafili II, was a Baha'i convert. Samoa hosts one of seven Baha'i Houses of Worship in the world; completed in 1984 and dedicated by the Head of State, it is located in Tiapapata, 8 km (5 mi) from Apia.

What church's religion does 19.4% of the Samoan population practice?
Output:
Roman Catholic