Assertion: female yak | /r/HasProperty | mated
Facets:
value: once every second year
type: TEMPORAL
Source sentences:
text: In ordinary production herds in the mountainous regions of China, a general average figure is that 50 - 70 percent of yak cows of suitable age show oestrous in any one year and that such female yak are mated and calve twice in three years, or once every second year.