input: Barclay appears as a guest character in Voyager. His first appearance is in the third episode of the second season, "Projections", although this is as a holographic character. In this episode, it is claimed that Barclay worked with Dr. Lewis Zimmerman to develop the EMH doctor program, although since Barclay's appearance is actually caused by a holographic breakdown this may not actually be the case. Working on Starfleet's "Pathfinder" project, Barclay becomes obsessed with the crew of the lost USS Voyager, which has been stranded in the Delta Quadrant for over five years. He once again creates simulacra on a holodeck, this time of the Voyager crew, but based on facts available to him about their true personalities (for the most part; because he named his cat Neelix, he makes the holodeck Neelix purr). With the help of these holograms and Deanna Troi--with whom he has developed a close friendship--he devises a method to use a micro-wormhole to establish two-way communication with Voyager. This plan is initially shot down, but Barclay defies direct orders and breaks into the laboratories, ultimately making successful contact with the real Voyager. During this incident, Barclay also works through his relapse into holo-addiction; as he reveals to Deanna, he'd lost his "family" after leaving the Enterprise and did not know how to cope except with fake people. Barclay's work on the Pathfinder project earns him a promotion to full lieutenant (previously he had been a lieutenant junior grade). During this period ("Inside Man"), a hologram of him is sent to Voyager to help them find a way home, but the hologram was altered by Ferengi trying to acquire Seven of Nine's Borg nanoprobes by convincing the crew to attempt a method of return that would have destroyed all organic matter on the ship. Barclay and Troi manage to work out what is happening, and Barclay is then able to dupe the Ferengi into abandoning their plan by posing as the hologram and claiming that Voyager was equipped to survive the trip and was more heavily armed than they actually were. An alternate future in the Voyager series finale "Endgame" shows an older Barclay teaching at Starfleet Academy, with the rank of Commander. By this point, Barclay has long since conquered his negative personal habits and is much more confident and secure with himself. The proper timeline's version of him is present when a transwarp aperture opens near Earth. Correctly deducing that it has been opened by Voyager, he witnesses the battle that follows with the Borg sphere and Voyager's return to the Alpha Quadrant.

Answer this question "What else does he do in this series?"
output: In this episode, it is claimed that Barclay worked with Dr. Lewis Zimmerman to develop the EMH doctor program,

input: Composers of the late 18th century became fascinated with the new possibilities of the symphony and other instrumental music, and generally neglected choral music. Mozart's choral works, though not as numerous as his works for other media, stand out as some of his greatest (such as the "Great" Mass in C minor and Requiem in D minor, the latter of which is often considered the greatest Requiem Mass of all time). Haydn became more interested in choral music near the end of his life following his visits to England in the 1790s, when he heard various Handel oratorios performed by large forces; he wrote a series of masses beginning in 1797 and his two great oratorios The Creation and The Seasons. Beethoven wrote only two masses, both intended for liturgical use, although his Missa solemnis is probably suitable only for the grandest ceremonies due to its length, difficulty and large-scale scoring. He also pioneered the use of chorus as part of symphonic texture with his Ninth Symphony and Choral Fantasia. In the 19th century, sacred music escaped from the church and leaped onto the concert stage, with large sacred works unsuitable for church use, such as Berlioz's Te Deum and Requiem, and Brahms's Ein deutsches Requiem. Rossini's Stabat mater, Schubert's masses, and Verdi's Requiem also exploited the grandeur offered by instrumental accompaniment. Oratorios also continued to be written, clearly influenced by Handel's models. Berlioz's L'enfance du Christ and Mendelssohn's Elijah and St Paul are in the category. Schubert, Mendelssohn, and Brahms also wrote secular cantatas, the best known of which are Brahms's Schicksalslied and Nanie. A few composers developed a cappella music, especially Bruckner, whose masses and motets startlingly juxtapose Renaissance counterpoint with chromatic harmony. Mendelssohn and Brahms also wrote significant a cappella motets. The amateur chorus (beginning chiefly as a social outlet) began to receive serious consideration as a compositional venue for the part-songs of Schubert, Schumann, Mendelssohn, Brahms, and others. These 'singing clubs' were often for women or men separately, and the music was typically in four-part (hence the name "part-song") and either a cappella or with simple instrumentation. At the same time, the Cecilian movement attempted a restoration of the pure Renaissance style in Catholic churches.

Answer this question "Any particularly notable musics from this style/era?"
output:
A few composers developed a cappella music,