premise: Yves Saint Laurent is a fashion brand.
hypothesis: Yves Saint Laurent (brand) . Founded in 1961 it has been considered one of the world 's most prominent fashion houses and known for its modern and iconic pieces , such as its tuxedo jackets for women . Yves Saint Laurent ( [ iv sɛ̃ lɔʁɑ̃ ] ; 1 August 1936 -- 1 June 2008 ) was a French fashion designer and is regarded as being among the foremost fashion designers in the twentieth century .