You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "What was the original title of the opera in which Placido Domingo first appeared in 1961?" whose answer is "Violetta".
Each document should contain about 30 words, and these documents should contain useful information.

Query: Placido Domingo first opera 1961
Useful Output:

Doc 1: In 1961, Domingo performed his first leading role in “La Traviata” in Monterrey Mexico. And in November 1961 he made his American debut with the
Doc 2: In 1961 when he was 20 years old, the tenor made his operatic debut in Mexico City. In 1965, he made his debut at the Metropolitan Opera
Doc 3: He worked many minor jobs and as an accompanist before he landed his first leading role at the Teatro Maria Tereza Montoya in 1961, when he
Doc 4: Two years later, in 1961, Dallas, Texas saw Domingo's American debut in the role of Arturo in Donizetti's "Lucia di Lammermoor.  debut at the
Doc 5:  Domingo had already been singing regularly with the New York City Opera since 1965 and had made his US debut as early as 1961. Half a