The singer who released a 1988 album entitled "Watermark" was born in what month?
Exile (song): "Exile" is a song by the Irish singer Enya. Exile (song):  It was first released on her 1988 album "Watermark", and released as a single in 1991 after it was featured in the films "Green Card" and "L.A. Story". Enya: Eithne Pádraigín Ní Bhraonáin (anglicised as Enya Patricia Brennan; born 17 May 1961), better known professionally as Enya, is an Irish singer, songwriter, musician, and producer.
May