Question: Silent Night (German: "Stille Nacht, heilige Nacht" ) is a popular Christmas carol, composed in which year, by Franz Xaver Gruber, an Austrian primary school teacher, church organist and composer in the village of Arnsdorf? 
Sentence (from "Silent Night"): The version sung by Bing Crosby is the third best-selling single of all-time.
Relevant evidence: No