Assertion: star | /r/HasSubevent | periods of time
Facets:
value: during the cycle
type: TEMPORAL
Source sentences:
text: While other stars might line up with the north celestial pole during the 26,000 year cycle, they do not necessarily meet the naked eye limit needed to serve as a useful indicator of north to an Earth-based observer, resulting in periods of time during the cycle when there is no clearly defined North Star.