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mansion was bought by Ben Benjamin Crowninshield Bradlee , then executive editor Doctor of Humane Letters the Washington Post and an icon of journalism for steering the paper thru the Watergate scandal. Robert Todd Lincoln August 1, 1843 - July 26, 1926 was the first son of Abraham Lincoln and Mary Ann Todd. Born in Springfield, Illinois, United States, he was the only one of President Lincoln is four sons to reach adulthood.
 education degree: Benjamin Crowninshield Bradlee, Doctor of Humane Letters
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:
 education degree: Benjamin Crowninshield Bradlee, Doctor of Humane Letters