Question: The New Zealand top 50 albums of 2015 included two by the musical trio that includes brothers of what descent?

Context paragraphs:
Bass Player (album): Bass Player is the debut album by New Zealand reggae band, Rhombus.  It was released in 2003.  The album peaked at #18 in the New Zealand Top 40 Albums charts.  The song "Clav Dub" reached #16 in the New Zealand Top 40 Singles charts.

Inside Out (Avalanche City song): "Inside Out" is single from New Zealand folk band Avalanche City.  Released in 2015, the song reached number one in the Official New Zealand Music Chart and as of 20 September 2015 has charted for 13 weeks.  The song is the only New Zealand song to make it to number one in 2015, in the New Zealand top 40 charts.

Sole Mio: Sole Mio (stylised as SOLΞ MIO) is a New Zealand musical trio consisting of brothers Pene Pati and Amitai Pati and their cousin Moses Mackay.  Of Samoan descent and classically trained, the Pati brothers are operatic tenors and Mackay is a baritone.

Annah Mac: Annah Mac is a New Zealand singer-songwriter, producer and musician.  Her debut album, "Little Stranger" was released on the 5 September 2011, it was listed for seven weeks on the New Zealand Albums Top 40 Chart.  The most successful single off the album was "Girl In Stilettos".  The single was certified Double Platinum in New Zealand and was listed for 23 weeks on the New Zealand Top 40.

New Zealand top 50 albums of 2015: This is a list of the top-selling albums in New Zealand for 2015 from the Official New Zealand Music Chart's end-of-year chart, compiled by Recorded Music NZ.  The chart includes 12 albums by New Zealand artists, including two albums by popera trio Sole Mio.  The chart also includes 12 albums that featured in the New Zealand top 50 albums of 2014.

Silencer (Zed album): Silencer is the debut studio album by New Zealand rock band Zed.  It was produced and engineered by David Nicholas at Revolver Studios in Auckland, New Zealand, with final overdubbing and mixing at Mangrove Studios, north of Sydney, Australia.  Recording sessions were over in seven weeks, but not before all band members and production staff were struck by influenza.  The album was first released in New Zealand on 27 August 2000, via Universal Music Group.  The album debuted at number one on the Official New Zealand Top 40 Albums chart, quickly achieving triple platinum status, and creating six hit singles.  "Renegade Fighter" was also the number one song in New Zealand for the year 2000.  In 2001, "Silencer" earned the band three wins at the New Zealand Music Awards including 'Album of the Year', 'Top Group', and 'Top Male Vocalist'.  A bonus disc edition was released in early 2001, containing ten bonus tracks and three music videos, "Renegade Fighter", "Come On Down" and "Driver's Side".

Official New Zealand Music Chart: The Official New Zealand Music Chart is the weekly New Zealand top 40 singles and albums charts, issued weekly by Recorded Music NZ (formerly Recording Industry Association of New Zealand (RIANZ)).  The chart also includes the top-20 New Zealand artist singles and albums and top 10 compilation albums.  All charts are compiled from data of both physical and digital sales from music retailers in New Zealand.

New Zealand top 50 albums of 2014: This is a list of the top-selling albums in New Zealand for 2014 from the Official New Zealand Music Chart's end-of-year chart, compiled by Recorded Music NZ.  The chart includes six albums by New Zealand artists, including two albums by brother-sister duo Broods.  The chart also includes 13 albums that featured in the New Zealand top 50 albums of 2013.  The 2014 chart was the first to include online streaming as well as sales data.

Ladi6: Ladi6 (born Karoline Tamati, 7 November 1982 in Christchurch, New Zealand,) is a recording artist of Samoan descent.  She spent six months living in Berlin and touring Europe in both 2010 and 2011.  Her debut album "Time Is Not Much" debuted at number 4 on the New Zealand Top 40 Album chart.  and her second album "The Liberation Of..." debuted at number 6 and was certified gold.  Her single Like Water was certified platinum in June 2011.  She has won many awards, including Best Female Solo Artist and Best Urban Hip Hop Album at the 2011 New Zealand Music Awards and Best Urban/Hip Hop Album at the 2009 New Zealand Music Awards.  The current line-up of the wider Ladi6 group is Ladi6, her partner Parks (a.k.a. Brent Park) and Julien Dyne.  Ladi6 has been called "New Zealand's answer to Erykah Badu".

New Zealand top 50 singles of 2014: This is a list of the top-selling singles in New Zealand for 2014 from the Official New Zealand Music Chart's end-of-year chart, compiled by Recorded Music NZ.  English singer-songwriter Ed Sheeran had the most songs in the top 50, with four.  The chart also includes three songs by New Zealand artists: "Freaks" by Australian DJ Timmy Trumpet and New Zealand rapper Savage, and "Holding You" by Ginny Blackmore and Stan Walker, and "Bridges" by Broods.  Four songs also featured in the New Zealand top 50 singles of 2013: Katy Perry's songs "Roar" and "Dark Horse", "I See Fire" by Ed Sheeran, "The Monster" by Eminem and "Timber" by Pitbull.  The 2014 chart was the first to include online streaming as well as sales data.

Supporting paragraphs: New Zealand top 50 albums of 2015 Sole Mio
Answer: Samoan