Question: The Thiepval Memorial is a war memorial to 72,246 missing British and South African servicemen who died in what battle tha took place between July 1st and November 18th in 1916?
Sentence (from "South African War Memorial, Richmond Cemetery"): The memorial was unveiled by General Jan Smuts in 1921 and was the focus of pilgrimages from South Africa through the 1920s and 1930s, after which it was largely forgotten until the 1980s when the Commonwealth War Graves Commission took responsibility for its maintenance.
Relevant evidence: No