Assertion: snail's shell | /r/HasProperty | visible
Facets:
value: after twenty days
type: TEMPORAL
Source sentences:
text: After twenty days, the transparent shells and bodies are visible, and they break from their capsules and drift in the plankton as meroplanktonic veliger larvae (a temporary zooplanktonic stage of the lifecycle).
text: Slugs' shells are much smaller and not visible as they are underneath the flesh on their back.