Question: Luonnotar, Op. 70, is a tone-poem for soprano and orchestra, completed by who, in 1913, was a Finnish composer and violinist of the late Romantic and early-modern periods?
Sentence (from "List of compositions by Jean Sibelius"): Primarily known for his compositions for orchestra, the core of Sibelius's oeuvre is his set of seven symphonies, the Violin Concerto, and a number of tone poems, in particular "En saga", "Lemminkäinen" (which includes "The Swan of Tuonela"), "Finlandia", "Pohjola's Daughter", "The Oceanides", and "Tapiola".
Relevant evidence: No