4006
William Ward Duffield resigned from the Army on February 6, 1863, and returned to Michigan. After the war he had charge of coal mines in Pennsylvania and iron mines in Kentucky, and was chief engineer of the Kentucky Union Railroad. In 1879-1880 he served as a Michigan State Senator. He was appointed by President Grover Cleveland as Superintendent of the U.S. Coast and Geodetic Survey, 1894-1898. He spent his last years in Washington , D.C., where he died. He is buried in Arlington National Cemetery.
 place of death: William Ward Duffield, Washington
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: William Ward Duffield, Washington