claim: Gray Matters is a sandwich.
evidence: HMS Triumph -LRB- N18 -RRB- was a T-class submarine of the Royal Navy .. T-class. British T class submarine. submarine. submarine. Royal Navy. Royal Navy. She was laid down by Vickers at Barrow-in-Furness and launched in September 1938 .. Vickers. Vickers. Barrow-in-Furness. Barrow-in-Furness