She gave birth to daughter Isadora Bjarkardottir Barney on 3 October 2002. Björk and the Brodsky Quartet recorded a composition written, especially for her, by composer John Tavener called "Prayer of the Heart" in 2001, and it was played then for a slide show presentation in 2003 for the American photographer, Nan Goldin. In 2003, Björk released a box set called "Live Box", consisting of four CDs containing live recordings of her previous albums and a DVD featuring a video of one track from each CD. Each of the four CDs was later released separately at a reduced price. In August 2004, Björk released "Medúlla". During production, Björk decided the album would work best as an entirely vocal-based album. This initial plan was modified, as the majority of the sounds on the album are indeed created by vocalists but several feature prominent basic electronic programming, as well as the occasional musical instrument. Björk used the vocal skills of throat singer Tanya Tagaq, hip hop beatboxer Rahzel, Japanese beatboxer Dokaka, avant-rocker Mike Patton, Soft Machine drummer/singer Robert Wyatt, and several choirs. She again appropriated text from E. E. Cummings for the song "Sonnets/Unrealities XI". At the time, "Medúlla" became her highest charting album in the US, debuting at number 14. In August 2004, Björk performed the song "Oceania" at the Opening Ceremony of the 2004 Summer Olympics in Athens. As she sang, her dress slowly unfurled to reveal a 10,000 square foot (900 m2) map of the world, which she let flow over all of the Olympic athletes. The song "Oceania" was written especially for the occasion and features the talents of Shlomo, a Leeds-based beatboxer, and a London choir. An alternative version of the song began circulating on the Internet with additional vocals by Kelis. It originally appeared on the promotional "Oceania" single released to radio stations and later became available to the public as a B-side of the "Who Is It" single, which charted at number 26 in the UK. This was followed in early 2005 by "Triumph of a Heart", charting at number 31. A video for the potential next single, "Where Is the Line", was filmed in collaboration with the Icelandic artist Gabríela Friðriksdóttir in late 2004.