"I Don't Know What It Is" is a song written and performed by Canadian-American singer-songwriter Rufus Wainwright. It was the first single from Wainwright's third studio album "Want One" and was released in a slim-line jewel case format on July 26, 2004.
Want One features saxophone
( z1 feature :ARG0 ( z2 music :name ( z3 name :op "Want" :op "One" ) ) :ARG1 ( z4 saxophone ) )