political parties other than the Communist Party of Cuba, these parties are not permitted to engage in public political activities on the island. Alpha 66, an organization that targets the Cuban government of Fidel Castro. Christian Liberation Movement, a movement and group of Catholics that was founded by Oswaldo Payá. Ladies in White received the Sakharov Prize for Freedom of Thought from the European Parliament in 2005. Lawton Foundation, a organization to promote the "study, defense, and denunciation of human rights inside Cuba". The group was formed by Oscar Elías Biscet. Cuban Democratic Directorate, a non-governmental organization aligned with the Centrist Democrat International and International Democratic Union. Omega 7, a small terrorist group that operated against the Cuban government from the 1960s to the 1980s. Patriotic Union of Cuba – Founded by José Daniel Ferrer, a former member of the Christian Liberation Movement, it has defined itself as a civic organization that advocates for a peaceful but firm fight against any repression of civil liberties in the Republic of Cuba. Rosa Parks Feminist Movement for Civil Rights San Isidro Movement, a group of writers, artists, academics and journalists protesting restriction on freedom of expression, beginning in 2018. Varela Project, an organization reported to have collected more than 10,000 signatures for a referendum requesting freedom of the press, freedom of political association, and freedom to create private business in Cuba. According to Amnesty International, their methods were non-violent, and their philosophy was democratic. The government responded with its own petition drive to make the socialist system "untouchable", for which the government claimed 99% voter approval. Fidel Castro said that, "The revolutionary process of socialism cannot be reversed" and "Cuba will never return to capitalism". Yo No Coopero Con La Dictadura (), a civil resistance organization. Dissidents Black Spring During the "Black Spring" in 2003, the regime imprisoned 75 dissidents, including 29 journalists. Their cases were reviewed by Amnesty International who officially adopted them as prisoners of conscience. To the original list of 75 prisoners of conscience resulting from the wave of arrests in spring 2003, Amnesty International added four more dissidents in January 2004. They had been arrested in the same context as the other 75 but did not receive their sentences until much later. These prisoners have since been released in the face of international pressure. Tripartite talks between the Cuban government, the Catholic Church in Cuba and the Spanish