In Western art, early examples include Luigi Russolo's Intonarumori or noise intoners, and subsequent experiments by Dadaists, Surrealists, the Situationist International, and in Fluxus happenings. Because of the diversity of sound art, there is often debate about whether sound art falls within the domain of either the visual art or experimental music categories, or both.[2] Other artistic lineages from which sound art emerges are conceptual art, minimalism, site-specific art, sound poetry, electro-acoustic music, spoken word, avant-garde poetry, and experimental theatre.