Complex sentence: Additionally, the Winston Graham Historical Prize was initiated as part of the Centenary Celebrations; funded by a legacy from the author and supported by Pan Macmillan, it is awarded for a work of unpublished fiction, preferably with an association with Cornwall.
Split into simpler sentences: Additionally, the Winston Graham Historical Prize was initiated as part of the Centenary Celebrations. Funded by a legacy from the author and supported by Pan Macmillan, it is awarded for a work of unpublished fiction, preferably with an association with Cornwall.