Question: Sydney Mervin "Merv" Batt was a frequent opponent for many foreign wrestlers travelling overseas including NWA World Heavyweight Champions such as one who was called, "probably the greatest champion of the 20th century." by who?
Sentence (from "WWC Universal Heavyweight Championship"): Since being established, the WWC Universal Heavyweight Championship has been held by forty-nine different wrestlers and has also been held up on nineteen occasions and vacated or stripped thirteen times.
Relevant evidence: No