You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Martin_Luther

Context:
Luther's hymns were frequently evoked by particular events in his life and the unfolding Reformation. This behavior started with his learning of the execution of Johann Esch and Heinrich Voes, the first individuals to be martyred by the Roman Catholic Church for Lutheran views, prompting Luther to write the hymn "Ein neues Lied wir heben an" ("A new song we raise"), which is generally known in English by John C. Messenger's translation by the title and first line "Flung to the Heedless Winds" and sung to the tune Ibstone composed in 1875 by Maria C. Tiddeman.

Question:
Why were Johann Esch and Heinrich Voes executed by the Catholic Church?

for Lutheran views