Article: During his tour on the guided missile frigate USS Gridley, Kerry requested duty in South Vietnam, listing as his first preference a position as the commander of a Fast Patrol Craft (PCF), also known as a "Swift boat." These 50-foot (15 m) boats have aluminum hulls and have little or no armor, but are heavily armed and rely on speed. "I didn't really want to get involved in the war", Kerry said in a book of Vietnam reminiscences published in 1986. "When I signed up for the swift boats, they had very little to do with the war. They were engaged in coastal patrolling and that's what I thought I was going to be doing." However, his second choice of billet was on a river patrol boat, or "PBR", which at the time was serving a more dangerous duty on the rivers of Vietnam.

Question: When did Kerry publish his memories of Vietnam?
Ans: 1986

Article: Ottoman Turkish was the official language of the Empire. It was an Oghuz Turkic language highly influenced by Persian and Arabic. The Ottomans had several influential languages: Turkish, spoken by the majority of the people in Anatolia and by the majority of Muslims of the Balkans except in Albania and Bosnia; Persian, only spoken by the educated; Arabic, spoken mainly in Arabia, North Africa, Iraq, Kuwait, the Levant and parts of the Horn of Africa; and Somali throughout the Horn of Africa. In the last two centuries, usage of these became limited, though, and specific: Persian served mainly as a literary language for the educated, while Arabic was used for religious rites.

Question: What were the main influences of the official language of the Empire?
Ans: Persian and Arabic

Article: In Canada, the largest Presbyterian denomination and indeed the largest Protestant denomination was the Presbyterian Church in Canada, formed in 1875 with the merger of four regional groups. In 1925, the United Church of Canada was formed by the majority of Presbyterians combining with the Methodist Church, Canada, and the Congregational Union of Canada. A sizable minority of Canadian Presbyterians, primarily in southern Ontario but also throughout the entire nation, withdrew, and reconstituted themselves as a non-concurring continuing Presbyterian body. They regained use of the original name in 1939.

Question: What is the largest Presbyterian church denomination in Canada?
Ans: Presbyterian Church in Canada

Article: In 1872, Russian Alexander Lodygin invented an incandescent light bulb and obtained a Russian patent in 1874. He used as a burner two carbon rods of diminished section in a glass receiver, hermetically sealed, and filled with nitrogen, electrically arranged so that the current could be passed to the second carbon when the first had been consumed. Later he lived in the USA, changed his name to Alexander de Lodyguine and applied and obtained patents for incandescent lamps having chromium, iridium, rhodium, ruthenium, osmium, molybdenum and tungsten filaments, and a bulb using a molybdenum filament was demonstrated at the world fair of 1900 in Paris.

Question: When did Lodygin invent his first lamp?
Ans:
1872