Assertion: platypus's claw | /r/HasProperty | retractable
Facets:
Source sentences:
text: Platypuses have two types of burrows which they dig with their retractable claws high up on the steep muddy banks; ‘nesting burrows’ are where a mother and her young take shelter for several months and are about three to six metres long, while ‘camping burrows’ are where individuals sleep on any given night and are about one to four metres long.