What opera was composed by an english composer who was born on the 12th of October 1872 and died on the 26th of August 1958?
Lovely Joan:  Its melody is most familiar to modern audiences as the counterpoint tune used in British composer Ralph Greaves's arrangement of "Fantasia on "Greensleeves"" from Ralph Vaughan Williams's opera "Sir John in Love"." Ralph Vaughan Williams: Ralph Vaughan Williams {'1': ", '2': ", '3': ", '4': "} ( 12 October 1872– 26 August 1958) was an English composer.
"Sir John in Love"