Input: Article: AC radio stations may play mainstream music, but they will exclude hip hop, dance tracks, hard rock, and some forms of teen pop, as they are less popular amongst the target demographic of these radio stations, which is intended for an adult audience. AC radio often targets the 2544 age group, the demographic that has received the most attention from advertisers since the 1960s. A common practice in recent years is that many adult contemporary stations play less newer music because they also give ample airtime to hits of the past, so the de-emphasis on new songs slows the progression of the AC chart.

Now answer this question: What age group does adult contemporary radio typically focus on?

Output: 2544

Input: Article: In the mid-19th century, Serbian (led by self-taught writer and folklorist Vuk Stefanovic Karadzic) and most Croatian writers and linguists (represented by the Illyrian movement and led by Ljudevit Gaj and uro Danicic), proposed the use of the most widespread dialect, Shtokavian, as the base for their common standard language. Karadzic standardised the Serbian Cyrillic alphabet, and Gaj and Danicic standardized the Croatian Latin alphabet, on the basis of vernacular speech phonemes and the principle of phonological spelling. In 1850 Serbian and Croatian writers and linguists signed the Vienna Literary Agreement, declaring their intention to create a unified standard. Thus a complex bi-variant language appeared, which the Serbs officially called "Serbo-Croatian" or "Serbian or Croatian" and the Croats "Croato-Serbian", or "Croatian or Serbian". Yet, in practice, the variants of the conceived common literary language served as different literary variants, chiefly differing in lexical inventory and stylistic devices. The common phrase describing this situation was that Serbo-Croatian or "Croatian or Serbian" was a single language. During the Austro-Hungarian occupation of Bosnia and Herzegovina, the language of all three nations was called "Bosnian" until the death of administrator von Kallay in 1907, at which point the name was changed to "Serbo-Croatian".

Now answer this question: What 1850 document formally declared the intent to create a unified standard?

Output: Vienna Literary Agreement

Input: Article: In 2003 Imperial was granted degree-awarding powers in its own right by the Privy Council. The London Centre for Nanotechnology was established in the same year as a joint venture between UCL and Imperial College London. In 2004 the Tanaka Business School (now named the Imperial College Business School) and a new Main Entrance on Exhibition Road were opened by The Queen. The UK Energy Research Centre was also established in 2004 and opened its headquarters at Imperial College. In November 2005 the Faculties of Life Sciences and Physical Sciences merged to become the Faculty of Natural Sciences.

Now answer this question: The Londre Centre for Nanotechnology was a joint effort between UCL and which college?

Output:
Imperial College London