Question: The unfinished opera Modest Mussorgsky was written by a man who was a member of numeric group.
Sentence (from "Modest Mussorgsky"): Modest Petrovich Mussorgsky (Russian: Моде́ст Петро́вич Му́соргский ; ] ; 21 March [O.S. 9 March] 1839 – 28 March [O.S. 16 March] 1881 ) was a Russian composer, one of the group known as "The Five".
Relevant evidence: Yes