Question: The song the knocked off Brother from RIANZ Top 40 was released on which day ?

Context paragraphs:
Part of Me (Stellar song): "Part of Me" is New Zealand band Stellar's third single, and their second single from their debut album "Mix".  This song was the group's first RIANZ top 10 single, spending two weeks at #4 before completely dropping out of the top 10.

Please Don't Go (Mike Posner song): "Please Don't Go" is a song by American recording artist Mike Posner, released as the second single from his debut album "31 Minutes to Takeoff" (2010).  Posner co-wrote and co-produced the song with Benny Blanco, and J Records released the single to contemporary hit radio in the United States on June 9, 2010.  The song peaked at number 16 on the "Billboard" Hot 100, giving Posner his second top 40 hit on that chart.  It also peaked at numbers 9, 18 and 30 on the Mainstream Top 40, Rhythmic and Adult Top 40 charts respectively.  It managed to peak within the top 40 in countries like Austria, Canada, Germany and New Zealand.  A remix of the song features American rapper, Waka Flocka Flame.

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.

What Doesn't Kill Me... (Young Sid album): What Doesn't Kill Me is the second studio album by New Zealand urban rapper Young Sid.  It features the singles "Never Waste a Day" and "Stuck in a Box" which features New Zealand soul singer Stan Walker.  The Album was released on 3 May 2010 and since then has debuted on the RIANZ album charts on 10 May 2010 at number 16.  It later peaked at number 11.  It then slipped off the charts after 8 weeks in the top 40.

Top 40 Tracks: Top 40 Tracks was a chart from "Billboard" magazine, which debuted in the issue dated December 5, 1998, when "Billboard" changed the airplay profile of the pop-heavy U.S. Hot 100 Airplay chart to incorporate more R&B, country, and rock stations to its radio panel.  To preserve the notion of the former chart, Top 40 Tracks was introduced.  The Top 40 Tracks was compiled by measuring audience impressions (based on a station's ratings and when a song is played) from Mainstream Top 40, Rhythmic Top 40, and Adult Top 40 radio stations.

The Official NZ Top 40: The Official NZ Top 40 was a NZ made music countdown television show which is a countdown of the New Zealand Singles Chart music.  It uses the official chart produced by the Recording Industry Association of New Zealand.  While the RIANZ charts are published for the week ending Monday, and published on Tuesday, The Official NZ Top 40 shows on Saturday evenings usually at 6pm unless changed due to other events.  The Official NZ Top 40 is also replayed on C4 again on Tuesday from 2pm to 4pm which is an extended version of the show.  The only change is the show will start showing most videos in full if applicable.

Brother (Smashproof song): "Brother" is a single by New Zealand hip-hop group Smashproof, released in early 2009.  The song features Gin Wigmore.  It was made as a metaphor to life in South Auckland.  The song debuted in New Zealand at number twenty-three on 26 January 2009, rising to number one in its fifth week, where it stayed on the RIANZ Top 40 for eleven weeks, finally being knocked off the top spot by Eminem's "We Made You".  It also had minor notoriety in Germany, reaching #81 on their national chart.

We Made You: "We Made You" is a song by American rapper Eminem from his sixth studio album "Relapse" (2009).  It was released as the second single from the album in April 7, 2009.  "We Made You" was written by Eminem, Andre Young, Dawaun Parker, Mark Batson, Trevor Lawrence Jr. and Walter Egan.  Production was handled by Dr. Dre, with Eminem and Doc Ish serving as additional co-producers.

Heaven &amp; Hell (Devolo album): Heaven & Hell is the debut solo-album by New Zealand/Hip-Hop artist Devolo.  The album's first single "Somebody" became a top 10 hit on the NZ iTunes top songs for all genres and #1 on NZ iTunes top hip hop downloads.  The second single "Too Shy" jumped from #38 to #6 in one week on New Zealand’s RIANZ Top 40 Singles Chart.  The album's third single was released one year after the original released of the album, it reached #6 on the IMNZ Top 10 Airplay.

Stellar (New Zealand band): Stellar (stylised Stellar*) was a New Zealand pop/rock band led by vocalist Boh Runga, sister of acclaimed recording artist Bic Runga.  They have had four RIANZ top 10 singles (the highest being "Every Girl" at #3) and two No. 1 albums.  The band's signature song is "Violent", which at the 2000 New Zealand Music Awards won the Single of the Year award, as well as winning Runga an award for best Songwriter.  The band won seven awards, among them the Best Album award for their debut, "Mix".  This was followed up by 2001's "Magic Line" and 2006's "Something Like Strangers".  The band officially disbanded in 2010 after releasing their greatest hits compilation.

Supporting paragraphs: Brother (Smashproof song) We Made You
Answer: April 7, 2009