Assertion: echidna's sex | /r/HasAspect | single opening
Facets:
Source sentences:
text: The reproductive organs also differ, but both sexes have a single opening called a cloaca, which they use to urinate, release their faeces and to mate.
text: The reproductive organs also differ, but both sexes have a single opening called a cloaca, which they use to urinate, release their faeces and to mate.