Assertion: unit's length | /r/HasProperty | travelled by light
Facets:
value: in vacuum
type: LOCATION
value: during a time interval of ​1⁄
type: TEMPORAL
Source sentences:
text: The base unit in the International System of Units (SI) is the metre, defined as "the length of the path travelled by light in vacuum during a time interval of ​1⁄ 299792458 seconds.