On the Catalan side, a flight was made with one hundred representatives of the cultural, civic, intellectual, artistic and sporting world of Catalonia, but on the Spanish side, except Santiago Carrillo, a politician from the Second Republic, did not attend any more. The subsequent failure of the statutory reform with respect to its objectives opened the door to the growth of Catalan sovereignty. The conservative Partido Popular, which had opposed the statute in the Spanish parliament, challenged its constitutionality in the Spanish High Court of Justice. The case lasted four years. In its judgement, issued on 18 June 2010, the court ruled that fourteen articles in the statute were unconstitutional, and that 27 others were to be interpreted restrictively. The affected articles included those that gave preference to the Catalan language, freed Catalonia from responsibility for the finances of other autonomous communities, and recognised Catalonia as a nation. The full text of the judgement was released on 9 July 2010, and the following day a protest demonstration organised by the cultural organisation Òmnium Cultural was attended by over a million people, and led by José Montilla. During and after the court case, a series of symbolic referendums on independence were held in municipalities throughout Catalonia. The first of these was in the town of Arenys de Munt on 13 September 2009. About 40% of eligible voters participated, of whom 96% voted for independence. In all, 552 towns held independence referendums between 2009 and 2011. These, together with demonstrations organised by Òmnium Cultural and the Assemblea Nacional Catalana (ANC), represented a "bottom-up" process by which society influenced the political movement for independence. At an institutional level, several municipalities of Catalonia came together to create the Association of Municipalities for Independence, an organisation officially established on 14 December 2011 in Vic which brought local organisations together to further the national rights of Catalonia and promote its right to self-determination. The demonstration of 11 September 2012 explicitly called on the Catalan government to begin the process of secession. Immediately after it, Artur Mas, whose CiU had regained power in 2010, called a snap election for 25 November 2012, and the parliament resolved that a referendum on independence would be held in the life of the next legislature. Although the CiU lost seats to the ERC, Mas remained in power. 2014 Referendum Mas and ERC leader Oriol Junqueras signed an agreement by which the