Input: Article: In September 2010, Brian May announced in a BBC interview that Sacha Baron Cohen was to play Mercury in a film of the same name. Time commented with approval on his singing ability and visual similarity to Mercury. However, in July 2013, Baron Cohen dropped out of the role due to "creative differences" between him and the surviving band members. In December 2013, it was announced that Ben Whishaw, best known for playing Q in the James Bond film Skyfall, had been chosen to replace Cohen in the role of Mercury. The motion picture is being written by Peter Morgan, who had been nominated for Oscars for his screenplays The Queen and Frost/Nixon. The film, which is being co-produced by Robert De Niro's TriBeCa Productions, will focus on Queen's formative years and the period leading up to the celebrated performance at the 1985 Live Aid concert.

Now answer this question: In what year did Queen perform at Live Aid?

Output: 1985

Input: Article: In the course of this religious upheaval, the German Peasants' War of 152425 swept through the Bavarian, Thuringian and Swabian principalities. After the Eighty Years' War in the Low Countries and the French Wars of Religion, the confessional division of the states of the Holy Roman Empire eventually erupted in the Thirty Years' War between 1618 and 1648. It devastated much of Germany, killing between 25% and 40% of its population. The main tenets of the Peace of Westphalia, which ended the Thirty Years' War, were:

Now answer this question: What treaty ended the Thirty Years' War?

Output: the Peace of Westphalia

Input: Article: Delicate sounds and fine overtones were mostly lost, because it took a lot of sound energy to vibrate the recording horn diaphragm and cutting mechanism. There were acoustic limitations due to mechanical resonances in both the recording and playback system. Some pictures of acoustic recording sessions show horns wrapped with tape to help mute these resonances. Even an acoustic recording played back electrically on modern equipment sounds like it was recorded through a horn, notwithstanding a reduction in distortion because of the modern playback. Toward the end of the acoustic era, there were many fine examples of recordings made with horns.

Now answer this question: What were issues facing play back and recording mechanics?

Output:
acoustic limitations