 Complete the following phrase:  An audition stage took place between 627 November 2016, to determine which acts would proceed to the next round of qualification. The semi-finals which took place between 1719 February 2017, were divided into five categories male voice; female voice; mixed; youth; and childrens choirs with the winner from each of the competing categories advancing to the grand final on 9 April 2017. Côr Merched Sir Gâr won the final of Côr Cymru 2017, and will represent at the 