Question: "Dulce et Decorum est", was written in which year, and published posthumously in 1920, a poem written by Wilfred Owen during World War I?
Sentence (from "Dulce et Decorum est"): The earliest surviving manuscript is dated 8 October 1917 and addressed to his mother, Susan Owen, with the message "Here is a gas poem done yesterday (which is not private, but not final)."
Relevant evidence: No