Assertion: grief's stage | /r/CapableOf | evolve since their introduction
Facets:
Source sentences:
text: The stages have evolved since their introduction and have been very misunderstood over the past four decades.
text: The stages have evolved since their introduction and have been very misunderstood over the past four decades.
text: The stages have evolved since their introduction and they have been very misunderstood over the past three decades.