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In 1744 Walker was appointed professor of moral philosophy at Cambridge , and in 1745 he was nominated rector of Thorpland in Norfolk, a living which he exchanged in 1757 for that of Upwell. He was devoted to horticulture, and had a small garden within the precincts of Trinity College which was famous for exotic plants, including the pineapple, banana, coffee shrub, logwood tree, and torch thistle, which, with the aid of a hothouse, he was able to raise. On 16 July 1760 he purchased the principal part of the land now forming the Cambridge University Botanic Garden from Richard Walker  Whish, a vintner, and on 25 Aug. 1762 conveyed it to the university in trust for its present purpose. In 1763 he published anonymously A Short Account of the late Donation of a Botanic Garden to the University of Cambridge. He died at Cambridge, unmarried, on 15 December 1764.
 place of death: Richard Walker , Cambridge
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: place of death, place of birth, education degree, education institution 
Text: {0} 
Answer:
 place of death: Richard Walker , Cambridge