Problem: Background: Ai Otsuka (Da Zhong  Ai , Otsuka Ai, born September 9, 1982) is a Japanese singer-songwriter from Suminoe-ku, Osaka, Japan. She is a popular artist on the Avex Trax label and is best known for her 2003 hit "Sakuranbo," which stayed in the Top 200 Oricon Weekly Singles Chart for 103 weeks. A piano player since age four, Otsuka composes and co-produces her own songs, as well as writes her own lyrics. Her music ranges from upbeat pop/rock music to ballads.
Context: On April 11, 2007 Otsuka released a new single, "Love no Theme," as the self-created bunny rabbit character "Love-chan". "Love no Theme" was sung on her Jam Punch Tour 2005. Before its release, it was titled I canChu before it was changed to "Love no Theme". The "Love no Theme" single included a preview of a new single featuring Love, titled "White Choco." This song could only be found previously on the promotional CD released before "Momo no Hanabira". "Love no Theme" unfortunately did not sell as well as Otsuka's normal singles.  Otsuka released her first single after Ai am Best, "Peach/Heart" on July 25, 2007. The first A-side "Peach" is an up-beat summer song and was used as the end theme for the summer drama Hanazakari no Kimitachi E (starring Maki Horikita and Shun Oguri), while the second "Heart" is a mid-tempo track. The single also includes a rearranged version of "Renai Shashin", titled "Renai Shashin -Haru-" (Lian Ai Xie Zhen  -Chun -, Love Photograph -Spring-).  On September 26, 2007, Otsuka released two CDs and a DVD. The first CD was Otsuka's fourth original album, titled Love Piece. This included all of her singles from "Frienger" to "Peach/Heart", with five new songs on an 11-track album. The album was released in CD+DVD and CD-only formats, with the DVD including a music video of "Heart" and "Kumuriuta" (kumuriuta), a song from the album. The first-press of the DVD also includes the PV of "U-Boat," while the first-press of the CD-only version comes with a 40-page color photobook. The second CD was a limited pressing re-release of the best album "Ai am Best" in CD-only format.  Also on September 26, Otsuka released a DVD of her Ai am Best Tour 2007, recorded at the Tokyo International Forum Hall A on July 9, 2007. The DVD is available in a single-disc edition, as well as a special two-disc edition with outtakes of the tour. The first-press of the special edition comes with a 40-page photobook.  Otsuka performed at Makuhari Messe on July 7, 2007, for one of Japan's two Live Earth concerts, alongside contemporaries Kumi Koda and Ayaka.
Question: What dvd was released?
Answer: a DVD of her Ai am Best Tour 2007, recorded at the Tokyo International Forum Hall

Problem: Background: An orchestra ( or US: ; Italian: [or'kestra]) is a large instrumental ensemble typical of classical music, which mixes instruments from different families, including bowed string instruments such as violin, viola, cello and double bass, as well as brass, woodwinds, and percussion instruments, each grouped in sections. Other instruments such as the piano and celesta may sometimes appear in a fifth keyboard section or may stand alone, as may the concert harp and, for performances of some modern compositions, electronic instruments. The term orchestra derives from the Greek orkhestra (orchestra), the name for the area in front of a stage in ancient Greek theatre reserved for the Greek chorus. A full-size orchestra may sometimes be called a symphony orchestra or philharmonic orchestra.
Context: The typical symphony orchestra consists of four groups of related musical instruments called the woodwinds, brass, percussion, and strings (violin, viola, cello and double bass). Other instruments such as the piano and celesta may sometimes be grouped into a fifth section such as a keyboard section or may stand alone, as may the concert harp and electric and electronic instruments. The orchestra, depending on the size, contains almost all of the standard instruments in each group.  In the history of the orchestra, its instrumentation has been expanded over time, often agreed to have been standardized by the classical period and Ludwig van Beethoven's influence on the classical model. In the 20th century, new repertory demands expanded the instrumentation of the orchestra, resulting in a flexible use of the classical-model instruments and newly developed electric and electronic instruments in various combinations.  The terms symphony orchestra and philharmonic orchestra may be used to distinguish different ensembles from the same locality, such as the London Symphony Orchestra and the London Philharmonic Orchestra. A symphony orchestra will usually have over eighty musicians on its roster, in some cases over a hundred, but the actual number of musicians employed in a particular performance may vary according to the work being played and the size of the venue.  Chamber orchestra usually refers to smaller-sized ensembles; a major chamber orchestra might employ as many as fifty musicians; some are much smaller than that. The term concert orchestra may also be used, as in the BBC Concert Orchestra and the RTE Concert Orchestra.
Question: What happened because of the expanded instrumentation?
Answer:
a flexible use of the classical-model instruments and newly developed electric and electronic instruments in various combinations.