Input: Article: Nasser was informed of the BritishAmerican withdrawal via a news statement while aboard a plane returning to Cairo from Belgrade, and took great offense. Although ideas for nationalizing the Suez Canal were in the offing after the UK agreed to withdraw its military from Egypt in 1954 (the last British troops left on 13 June 1956), journalist Mohamed Hassanein Heikal asserts that Nasser made the final decision to nationalize the waterway between 19 and 20 July. Nasser himself would later state that he decided on 23 July, after studying the issue and deliberating with some of his advisers from the dissolved RCC, namely Boghdadi and technical specialist Mahmoud Younis, beginning on 21 July. The rest of the RCC's former members were informed of the decision on 24 July, while the bulk of the cabinet was unaware of the nationalization scheme until hours before Nasser publicly announced it. According to Ramadan, Nasser's decision to nationalize the canal was a solitary decision, taken without consultation.

Now answer this question: When did the last British troops leave Egypt?

Output: 1956

Input: Article: The Latin alphabet of the time still lacked the letters j and w, and there was no v as distinct from u; moreover native Old English spellings did not use k, q or z. The remaining 20 Latin letters were supplemented by four more: (sc, modern ash) and (t, now called eth or edh), which were modified Latin letters, and thorn and wynn , which are borrowings from the futhorc. A few letter pairs were used as digraphs, representing a single sound. Also used was the Tironian note (a character similar to the digit 7) for the conjunction and, and a thorn with a crossbar through the ascender for the pronoun t. Macrons over vowels were originally used not to mark long vowels (as in modern editions), but to indicate stress, or as abbreviations for a following m or n.

Now answer this question: Along with k and z, what Latin letter was not used in Old English?

Output: q

Input: Article: Britain's first use of brass occurred around the 3rd2nd century BC. In North America, copper mining began with marginal workings by Native Americans. Native copper is known to have been extracted from sites on Isle Royale with primitive stone tools between 800 and 1600. Copper metallurgy was flourishing in South America, particularly in Peru around 1000 AD; it proceeded at a much slower rate on other continents. Copper burial ornamentals from the 15th century have been uncovered, but the metal's commercial production did not start until the early 20th century.

Now answer this question: When did commercial production of copper begin?

Output:
early 20th century