Assertion: yak's head | /r/HasProperty | valid though periphrastic way
Facets:
Source sentences:
text: One head of cattle" is a valid though periphrastic way to refer to one animal of indeterminate or unknown age and sex; otherwise no universally used single-word singular form of cattle exists in modern English, other than the sex- and age-specific terms such as cow, bull, steer and heifer.