Assertion: brood's number | /r/HasProperty | lower zero
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: Tadpoles also lack true teeth, but the jaws in most species usually have two elongate, parallel rows of small keratinized structures called keradonts in the upper jaw while the lower jaw has three rows of keradonts, surrounded by a horny beak, but the number of rows can be lower (sometimes zero), or much higher.