Assertion: tobacco's chemical | /r/HasProperty | identified in cigarette smoke
Facets:
value: to date
type: TEMPORAL
Source sentences:
text: Over 7,000 chemicals have been identified in cigarettes and cigarette smoke to date, 93 of which are harmful or potentially harmful, and more than 70 of which can cause cancer.﻿﻿
text: More than 70 such cancer-causing chemicals have been identified in cigarette smoke to date.