Assertion: platypus's diet | /r/HasProperty | food
Facets:
value: over the years
type: TEMPORAL
Source sentences:
text: Scientists believe that the platypus is stomach-less because its diet doesn’t include foods that require the typical complex digestion.
text: The best theory is that the diet it has become used to over the years didn’t include foods that required the usual complex digestion so the species simply stopped producing stomachs.