Assertion: cat's kitten | /r/HasProperty | aborted
Facets:
value: spontaneously
type: MANNER
value: usually
type: DEGREE
Source sentences:
text: Being homozygous for (having two copies of) the tailless gene is semilethal, and kittens with two tailless genes are usually spontaneously aborted, so tailless Manx cats are bred from one tailless parent and one tailed parent.