Assertion: nuclear explosion | /r/CapableOf | touch the surface of the earth
Facets:
value: upon its expansion
type: TEMPORAL
value: since the fireball
type: TEMPORAL
Source sentences:
text: A nuclear explosion at low altitudes is the most dangerous with respect to radioactivity, since the fireball, upon its expansion, touches the surface of the earth, an enormous column of dust and dirt is lifted skyward, and radioactive products subsequently fall out together with the dust.