Complex sentence: Dunan or Donat (born 1038 died 1074), bishop of Dublin, was an Easterling or Ostman, and the first of the line of prelates who have occupied the see.
Split into simpler sentences: Dunan or Donat (born 1038 died 1074), was bishop of Dublin. Dunan was an Easterling or Ostman, and the first of the line of prelates who have occupied the see.