Title: Diarmuid and Grania
Content:  Diarmuid and Grania is a play in poetic prose co-written by George Moore and W. B. Yeats in 1901, with incidental music by the English composer Edward Elgar.
Title: The Pursuit of Diarmuid and Gráinne
Content: Diarmuid and Grania is a 1901 play in poetic prose by George Moore and W. B. Yeats, based on the translation of the tale by Lady Gregory, with incidental music by Edward Elgar. ; Tóruigheact Dhiarmada agus Ghráinne was translated by Nessa Ní Shéaghda in 1967 and used in schools for study in Irish literature. ; Dancing on Dangerous Ground is a 1999 dance show based on the tale. ; The character Declan tells a version of the tale to Anna in the 2010 film Leap Year. ; The Irish writer and director Paul Mercier updated the story to Dublin's criminal underworld in his 2001 play Diarmuid and Gráinne. The film Pursuit, directed by him with a script adapted from the play, was released in 2015. 
Title: The Pursuit of Diarmuid and Gráinne
Content:  The Pursuit of Diarmuid and Gráinne (Tóraigheacht Dhiarmada agus Ghráinne or Tóraíocht Dhiarmada agus Ghráinne in modern spelling) is an Irish prose narrative surviving in many variants. A tale from the Fenian Cycle of Irish mythology, it concerns a love triangle between the great warrior Fionn mac Cumhaill, the beautiful princess Gráinne, and her paramour Diarmuid Ua Duibhne. Surviving texts are all in Modern Irish and the earliest dates to the 16th century, but some elements of the material date as far back as the 10th century.
Title: Diarmuid and Grania
Content:  George Moore wrote a novel based on a translation by Lady Gregory of the Fenian tale The Pursuit of Diarmuid and Gráinne. W. B. Yeats then collaborated with Moore in writing the play. The play, in three acts, was dedicated to Henry Wood, and its first performance was by Frank Benson's English Shakespearean Company at the Gaiety Theatre, Dublin on 21 October 1901; it appeared in a double bill, being followed by Douglas Hyde's Casadh an tSugáin (The Twisting of the Hay Rope) performed by Irish-speaking amateurs supplied by the Gaelic League (the first Irish-language play ever seen on a regular stage). The part of Diarmuid was played by Benson, Grania by his wife Constance, and Laban by Lucy Franklein. Although the collaboration had been difficult – Yeats and Moore disagreed frequently, mainly about style, and there was therefore no final version for publication – the production was well received. There was also controversy because the Irish characters were played by English actors. After the play was produced, Yeats, whose commitment had occasionally seemed to waver, defended it against all criticism.
Title: Diarmuid Ó Gráinne
Content:  Diarmuid Ó Gráinne (10 May 1950 – 28 August 2013) was an Irish-language writer and journalist from the County Galway Gaeltacht. He wrote for the newspaper, Lá and featured on Raidió na Gaeltachta. He released a number of books, perhaps best known works are his semi-autobiographical novel writings An Traimp and Muintir na Coille. Ó Gráinne was strongly influenced by his fellow Connemara-man, Máirtín Ó Cadhain whose death he felt left a hole in the leadership of the Irish-language movement. Ó Gráinne also took an interest in some Continental European authors, translating writings by or autobiographies about Karl Marx, Albert Camus and Friedrich Nietzsche into Irish.
Title: Diarmuid Ua Duibhne
Content:  Mac Art, the high king of Ireland. Gráinne thought that she would be marrying Fionn's son Oisín or grandson Oscar, not the aging Fionn himself. Disappointed to find that her fiancé was old enough to be her grandfather, she determined not to marry Fionn, but to run away with one of the champions of the Fianna. Grainne administered drugs into the wine of the guests save for Oisín, Oscar, Diarmuid, Caílte and Diorruing. She approached Oisín, who refused her request, then she approached Diarmuid. Diarmuid also objected to her advances because Fionn was a friend and his leader. Grainne imposed a geis on Diarmuid 
Title: Diarmuid Ua Duibhne
Content:  Diarmuid Ua Duibhne ( Irish pronunciation: ) or Diarmid O'Dyna, also known as Diarmuid of the Love Spot, was a demigod, son of Donn and one of the Fianna in the Fenian Cycle of Irish mythology (traditionally set in the 2nd to 4th century). He is best known as the lover of Gráinne, the intended wife of Fianna leader Fionn mac Cumhaill in the legend The Pursuit of Diarmuid and Gráinne. Among his sons were Donnchadh, Iollann, Ruchladh and Ioruad. In the legend, the Tuatha Dé Danann god of love and creativity Aenghus Óg was Diarmuid's foster father and protector. According to the story, Diarmuid was a skilled warrior and a well-liked and valued member of the Fianna who single-handedly killed 3,400 warriors in a battle, saving Fionn and the Fianna.
Title: Diarmuid Ó Gráinne
Content: Céard a dhéanfas tú anois? (Coiscéim: 1997) 
Title: Diarmuid Ó Gráinne
Content: An Dá Mháirtín (Comhar: 1990) 
Title: Diarmuid Ó Gráinne
Content: Spéir thoirní (Coiscéim: 1993) ; Spealadh an drúchta (Coiscéim: 1995) ; Coill chríon na bhForbacha (Coiscéim: 2001) 

Question: Who was the composer of Diarmuid and Grania?
Answer: Edward Elgar.
Edward William Elgar.