 Complete the following phrase:  Máirtín Ó Cadhain ; 1906  18 October 1970 was one of the most prominent Irish language writers of the twentieth century. Perhaps best known for his 1949 work Cré na Cille, Ó Cadhain played a key role in bringing literary modernism to contemporary Irish language literature. Politically, he was an Irish nationalist and socialist, promoting the Athghabháil na hÉireann Re-Conquest of Ireland, through Gaelic culture. He was a member of the post- 