Question: Tripel beer was first introduced in 1956, by which Belgian abbey brewery?
Sentence (from "Tripel"): The style of Westmalle's "Tripel" and the name was widely copied by the breweries of Belgium, and in 1987 another Trappist brewery, the Koningshoeven in the Netherlands, expanded their range with a beer called "La Trappe Tripel", though they also produced a stronger beer they termed "La Trappe Quadrupel".
Relevant evidence: No