Assertion: north american monarch butterfly | /r/CapableOf | undertake the longest known voyage
Facets:
value: in the insect world
type: LOCATION
value: following a primeval call
type: TEMPORAL
value: year after year
type: TEMPORAL
Source sentences:
text: Year after year when autumn comes, following a primeval call that still remains a mystery to Science, the North American Monarch Butterfly undertakes the longest known voyage in the insect world.