Assertion: hoatzin's chick | /r/CapableOf | survive to adulthood
Facets:
value: decades of further efforts
type: TEMPORAL
Source sentences:
text: Josephine and Crip produced the first whooping crane born in captivity in 1950, but this chick only lived four days, and though decades of further efforts produced more than 50 eggs before Josephine's death in 1965, only four chicks survived to adulthood and none of them bred.