Malcolm Alan Murray (born 24 July 1964) is a New Zealand stage and television actor, best known for his role as Dr Alan Dubrovsky in the television soap opera "Shortland Street" between 1999 and 2001.
 In 2005 he won the Actor of the Year award at the Chapman Tripp Theatre Awards in Wellington for his portrayal of Dimitri Tsafendas in the Antony Sher play "I.D."
Lars Gustav Gabriel Hollmer (21 July 1948 – 25 December 2008) was a Swedish accordionist, keyboardist and composer, whose work drew on music ranging from Nordic folk tunes to progressive rock.
 He has been a member and/or founder of over half a dozen groups, most of whose work has been recorded at The Chickenhouse, his well outfitted home studio in his hometown of Uppsala.
 His work with the band Samla Mammas Manna, in the late 1960s and early 1970s and up to 2002, when the re-formed group played at the two-day ProgDay festival in North Carolina, was and is considered progressive rock.
 However, he is most centrally an empathetic and generous collaborator: whether as a member of Accordion Tribe, while working with the experimental guitarist Fred Frith, or while spending several months with Japanese jazz players, he seems to find a style that brings his partners to the fore while remaining identifiably himself.
 Though his work is little known in the United States, he won a Swedish Grammis award in 1999 for his record "Andetag".
 He has also composed extensively for Swedish film, as well as for theatre and dance productions.
 Consistent elements of his music throughout his career included use of irregular time signatures (often changing several times within a piece), a daring sense of improvisation (particularly vocal improvisation that utilized nonsense syllables), and used complex polyrhythms.
Dubrovsky District (Russian: Ду́бровский райо́н ) is an administrative and municipal district (raion), one of the twenty-seven in Bryansk Oblast, Russia.
 It is located in the north of the oblast.
 The area of the district is 1028 km2 .
 Its administrative center is the urban locality (a work settlement) of Dubrovka.
 Population:  (2010 Census) ; 23,145 (2002 Census);  (1989 Census) The population of Dubrovka accounts for 39.9% of the district's total population.
Jean-Nicolas-Gustave Van Nieuwen-Huysen (known as Gustave Vaëz) (6 December 1812 – 12 March 1862) was a Belgian playwright, librettist and translator of opera librettos.
 Born in Brussels, he studied law and earned a doctorate at the State University of Leuven.
 Since he had no desire to work as a lawyer, he devoted himself to a career as a playwright.
 He published a large number of plays.
 His first plays were staged from 1829 to 1834 in Brussels, which he left for Paris to work with librettist Alphonse Royer.
 Operas where Vaëz was involved as a librettist and translator are "Lucia di Lammermoor" (1839), "La favorite" and "Rita, ou Le mari battu" by Gaetano Donizetti (1840), and "Jérusalem" by Giuseppe Verdi.
 He died in Paris on 12 March 1862.
Marina DeBris is the name used by an Australian based artist whose work focuses on reusing trash to raise awareness of ocean and beach pollution.
 DeBris uses trash washed up from the beach to create trashion, 'fish tanks', decorative art and other works of art.
 She has also used beach trash to provide one perspective on what the earth might look like from space.
 As well as creating art from debris, DeBris also is a fund raiser for environmental organizations, and collaborates with non-profit organizations and schools to educate children about ocean pollution.
 DeBris is also a social activist, for example, participating in a panel on how artists can contribute to environmental public policy, promoting clean energy and curating eco-art exhibitions.
 DeBris's work is not just in pollution, but also works with non profits to raise funds for art education.
 DeBris is listed with the Women Environmental Artists Directory, has been cited by EcoSalon as one of four artists whose work raises awareness of environmental concerns, and has been listed as one of ten key eco artists.
 Interestingly, DeBris is also mentioned as an artist who's work is world-famous, comparable to Warhol, Lichtenstein, Kandinsky, and Pollack, is also listed as one of the 30 most influential contemporary women artists, and as one of 10 eco friendly artists who will blow your mind.
Dubrovsky (Russian: "Дубровский" ) is an opera in four acts (5 scenes) Op. 58, by Eduard Nápravník, to a Russian libretto by Modest Ilyich Tchaikovsky after the novel of the same title (1832) by Alexander Pushkin.
Peter Petrovich Dubrovsky Russian: "Пётр Петрович Дубровский" (born January 9 (?)
 1754 in Kiev, died January 9, 1816 in Petersburg), was a Russian bibliophile, diplomat, paleographer, secretary of the Russian Embassy in France, collector of manuscripts and books.
 Throughout his life he collected about 2000 manuscripts.
 Between 1805 and 1812 he worked at the Imperial Public Library.
Richard Michael Farber (born December 4, 1945), is an American-born Israeli composer and librettist whose career spans over more than four decades.
 Farber began his work as a theater and ballet composer from which he moved to large scale stage works and, recently, orchestral and vocal music; to date, Farber has penned eight operas, three of which had been premiered on stage and four on the radio in Germany (see below).
 Farber is the 2005 recipient of the Composers’ Prime Minister Award.
Modest Ilyich Tchaikovsky (Russian: Моде́ст Ильи́ч Чайко́вский ; 13 May [O.S. 1 May] 1850 –15 January [O.S. 2 January] 1916 ) was a Russian dramatist, opera librettist and translator.
Boris Yakovlevich Dubrovsky (Russian: Борис Яковлевич Дубровский , born 8 October 1939) is a retired Russian rower who had his best achievements in the double sculls, partnering with Oleg Tyurin.
 In this event, they won an Olympic gold in 1964 and four medals at European and world championships in 1962–1965.

Question: When was the Russian librettist whose work was used in the opera Dubrovsky born?
Answer: 13 May [O.S. 1 May] 1850