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the Countess of Mar. Sir Robert Erskine , who had been created Lord Erskine claimed the title through his descent from the Countess of Mar. Erskine is claim was refused by the king who said that the title belonged to the crown because the last male holder had been a Stewart. However the Erskines became guardians to the young James IV of Scotland despite of this dispute with the king. Five successive generations of Erskines were guardians of the royals.
 place of birth: Robert Erskine, Scotland
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 birth: Robert Erskine, Scotland