Assertion: peacock's chick | /r/HasProperty | hard
Facets:
value: until about two years of age
type: TEMPORAL
value: to sex
type: TRANSITIVE-OBJECT
Source sentences:
text: White chicks are hard to sex until about two years of age when the male will developed wispy tail coverts, because the bird does not change color much in its lifetime, and the male and female look so similar.