Assertion: moon | /r/HasProperty | shoemaker
Facets:
Source sentences:
text: Rays from the ejecta are superposed on all other surrounding terrains which places the crater in its namesake age group: the Copernican system, established as the youngest assemblage of rocks on the Moon (Shoemaker and Hackman, 1962, The Moon: London, Academic Press, p.289-300).