Assertion: maternal grandmother | /r/HasAspect | more contact
Facets:
Source sentences:
text: It therefore follows from evolutionary psychological logic that maternal grandmothers have more contact with, are closer to, and invest more heavily in their grandchildren than either maternal grandfathers or paternal grandmothers, who in turn have more contact with, are closer to, and invest more heavily in their grandchildren than paternal grandfathers.