Question: Are I Lombardi alla prima crociata and Giasone both operas?

Context articles: Gennaro Lombardi
I Lombardi alla prima crociata
Wet-on-wet
Lance Richlin
Jérusalem
Giasone
Eugenio Cavallini
Carlo Guasco
Kevin Short (singer)
Teresa Ruggeri

Gennaro Lombardi was an Italian immigrant who moved to the United States in 1897, and known for opening the first pizzeria in the United States, Lombardi's.
 He opened a small grocery store in New York City's Little Italy.
 An employee of his, Antonio Totonno Pero, also an Italian immigrant, began making pizza for the store to sell.
 Their pizza became so popular that Lombardi opened the first US pizzeria in 1905, naming it simply Lombardi's.
I Lombardi alla Prima Crociata ("The Lombards on the First Crusade") is an operatic "dramma lirico" in four acts by Giuseppe Verdi to an Italian libretto by Temistocle Solera, based on an epic poem by Tommaso Grossi, which was "very much a child of its age; a grand historical novel with a patriotic slant".
 Its first performance was given at the Teatro alla Scala in Milan on 11 February 1843.
 Verdi dedicated the score to Maria Luigia, the Habsburg Duchess of Parma, who died a few weeks after the premiere.
Wet-on-wet, or alla prima (Italian, meaning "at first attempt"), is a painting technique, used mostly in oil painting, in which layers of wet paint are applied to previously administered layers of wet paint.
 This technique requires a fast way of working, because the work has to be finished before the first layers have dried.
 It may also be referred to as direct painting or the French term au premier coup (at first stroke).
Lance Richlin (born 1961) is a classical realist painter and a sculptor based in Torrance, California.
 His oil painting technique is an alla prima technique that requires the paint not to dry until completion.
Jérusalem is a grand opera in four acts by Giuseppe Verdi.
 The libretto was to be an adaptation and partial translation of the composer's original 1843 Italian opera, "I Lombardi alla prima crociata".
 It was the one opera which he regarded as the most suitable for being translated into French and, taking Eugène Scribe's advice, Verdi agreed that a French libretto was to be prepared by Alphonse Royer and Gustave Vaëz, who had written the libretto for Donizetti's most successful French opera, "La favorite".
 The opera received its premiere performance at the Salle Le Peletier in Paris on 26 November 1847.
 The maiden production was designed by Paul Lormier (costumes), Charles Séchan, Jules Diéterle and Édouard Desplechin (sets of Act I, Act II, scene 1, Act III scene 1, and Act IV), and Charles-Antoine Cambon and Joseph Thierry (sets for Act II, scene 2 and Act III, scene 2).
Giasone ("Jason") is an opera in three acts and a prologue with music by Francesco Cavalli and a libretto by Giacinto Andrea Cicognini.
 It was premiered at the Teatro San Cassiano, Venice on 5 January 1649, during carnival.
 "Giasone" was "the single most popular opera of the 17th century".
 The plot is loosely based on the story of Jason and the golden fleece, but the opera contains many comic elements too.
Eugenio Cavallini (16 June 1806 — 11 April 1881) was an Italian conductor, composer, violinist, and violist.
 In 1833 he became first violinist of the orchestra at La Scala, a post he held through 1855.
 He also served as a conductor at La Scala, notably leading the world premieres of Gaetano Donizetti's "Lucrezia Borgia" (1833), Donizetti's "Gemma di Vergy" (1834), Donizetti's "Maria Stuarda" (1835), Saverio Mercadante's "Il giuramento" (1837), Mercadante's "Il bravo" (1839), Giuseppe Verdi's "Oberto" (1839), Verdi's "Un giorno di regno" (1840), Donizetti's "Maria Padilla" (1841), Verdi's "Nabucco" (1842), Verdi's "I Lombardi alla prima crociata" (1843), Verdi's "Giovanna d'Arco" (1845), Federico Ricci's "Estella di Murcia" (1846), and Domenico Ronzani's "Salvator Rosa" (1854).
Carlo Guasco (16 March 1813 – 13 December 1876) was a celebrated Italian operatic tenor who sang in Italian and other European opera houses from 1837 to 1853.
 Although he sang in many world premieres, he is most remembered today for having created the leading tenor roles in Verdi's "I Lombardi alla prima crociata", "Ernani", and "Attila".
Kevin Short is an American operatic bass-baritone.
 A graduate of Morgan State University, the Curtis Institute of Music, and the Juilliard School, he won the bass-baritone award for the Middle Atlantic region Metropolitan Opera National Council Auditions in 1989.
 From 1991-1998 he appeared annually at the Metropolitan Opera, singing in a total of 129 performances.
 He notably created the role of Joseph in the world premiere of John Corigliano's "The Ghosts of Versailles" in 1991.
 Some of the other roles he has performed at the Met are Colline in "La Bohème", the Friar in "Don Carlos", Happy in "La fanciulla del West", the Jailer in "Dialogues of the Carmelites", Lackey in "Ariadne auf Naxos", Mandarin in "Turandot", Masetto in "Don Giovanni", Sciarrone in "Tosca", Pirro in "I Lombardi alla prima crociata", Yamadori in "Madama Butterfly", and Zaretsky in "Eugene Onegin".
 He also sang several roles with the New York City Opera during the 1980s and 1990s, including Nourabad in "The Pearl Fishers" and Raimondo in "Lucia di Lammermoor".
Teresa Ruggeri (sometimes spelled Ruggieri) was an Italian operatic soprano who had an active career from the 1820s through the 1840s.
 In 1827 she portrayed the role of Zarele in the world premiere of Giovanni Pacini's "Gli arabi nelle Gallie" at La Scala in Milan.
 She performed in several more world premieres at that house, including Francisca in Gaetano Donizetti's "Maria Padilla" (1841), Anna in Giuseppe Verdi's "Nabucco" (1842), and Viclinda in Verdi's "I Lombardi alla prima crociata" (1843).
 Other roles she performed at La Scala included Baroness Aspasia in Gioachino Rossini's "La pietra del paragone" (1829), Giannetta in Donizetti's "L'elisir d'amore" (1835), Alisa in Donizetti's "Lucia di Lammermoor" (1839), The Marquise of Birkenfeld in "La fille du régiment" (1840), and Giovanna in Verdi's "Ernani" (1844) among others.