Assertion: dugong's number | /r/CapableOf | indicate the age of a dugong
Facets:
Source sentences:
text: The number of growth layer groups in a tusk indicates the age of a dugong, and the cheekteeth move forward with age.
text: The number of growth layer groups in a tusk indicates the age of a dugong, and the cheekteeth move forward with age.
text: The number of growth layer groups in a tusk indicates the age of a dugong.
text: The number of growth layer groups in a tusk indicates the age of a dugong,  and the cheekteeth move forward with age.
text: The number of growth layer groups in a tusk indicates the age of a dugong, and the cheekteeth move forward with age.