On 4 January 2016, Barcelona's transfer ban ended. The same day, they registered 77 players across all categories and ages, and both last summer signings Arda Turan and Aleix Vidal became eligible to play with the first team. On 10 February, qualifying for the sixth Copa del Rey final in the last eight seasons, Luis Enrique’s Barcelona broke the club's record of 28 consecutive games unbeaten in all competitions set by Guardiola’s team in the 2010–11 season, with a 1–1 draw with Valencia in the second leg of the 2015–16 Copa del Rey.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): With which team did Barcelona have a 1-1 draw in the 2015-16 Copa del Rey?
Ah, so.. Valencia

The Napoleonic Wars were the cause of the final dissolution of the Holy Roman Empire, and ultimately the cause for the quest for a German nation state in 19th-century German nationalism. After the Congress of Vienna, Austria and Prussia emerged as two competitors. Austria, trying to remain the dominant power in Central Europe, led the way in the terms of the Congress of Vienna. The Congress of Vienna was essentially conservative, assuring that little would change in Europe and preventing Germany from uniting. These terms came to a sudden halt following the Revolutions of 1848 and the Crimean War in 1856, paving the way for German unification in the 1860s. By the 1820s, large numbers of Jewish German women had intermarried with Christian German men and had converted to Christianity. Jewish German Eduard Lasker was a prominent German nationalist figure who promoted the unification of Germany in the mid-19th century.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What declined after the fall of the Holy Roman Empire?
Ah, so.. unanswerable

The Duchy of Lancaster is one of two royal duchies in England. It has landholdings throughout the region and elsewhere, operating as a property company, but also exercising the right of the Crown in the County Palatine of Lancaster. While the administrative boundaries changed in the 1970s, the county palatine boundaries remain the same as the historic boundaries. As a result, the High Sheriffs for Lancashire, Greater Manchester and Merseyside are appointed "within the Duchy and County Palatine of Lancaster".
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What is the other royal duchy of England beyond the Duchy of Lancaster?
Ah, so..
unanswerable