Assertion: cigarette butt's filter | /r/HasProperty | introduced in 1950
Facets:
Source sentences:
text: The Cigarette Century, while the filter was initially introduced in the 1950s in response to growing (although industry-denied) health concerns, it soon became clear that they do not make smoking any less dangerous (and may actually contribute to its death toll by making smoking less irritating, thus easing initiation and increasing amounts smoked).