when was he appointed as archbishop?
4 December 1304
William Greenfield
Greenfield was elected by the Chapter of York on 4 December 1304;
what was the keldholme priory election dispute? The dispute occurred in Yorkshire, England. who was the dispute between? Archbishop of York and other nuns. and what was the dispute about? His candidate, Emma de Ebor', was  unacceptable by many nuns. who was the archbishop then? William Greenfield. when was he born? The date of his birth is now lost. where is he from? The eponymous Lincolnshire hamlet of Greenfield. what did he start his career as? A doctor of both civil and canon law.
wiki:20666816
William Greenfield [SEP] Archbishop of York
Greenfield was elected by the Chapter of York on 4 December 1304; however there was delay in his consecration due to the death of Pope Benedict XI; when finally consecrated it was by Clement V at Lyons, on 30 January 1306. Greenfield was strongly commended to the pope and cardinals by the King, who told them of his "...wisdom in council, industry, literary knowledge, and usefulness to the state". Before his appointment Greenfield had lived for some time resident in Rome where the cost of his living and the procuring of the Papal assent were very heavy leaving Greenfield obliged to borrow money and to remark, "All the money lenders were ecclesiastics.