Assertion: mantle's composition | /r/HasProperty | developed in 1980
Facets:
value: by gerlind dreibus
type: OTHER
value: by heinrich wänke
type: OTHER
Source sentences:
text: G. J. Taylor (University of Hawaii) summarized the standard model for the bulk composition of Mars, which was developed in the 1980s and 1990s by Heinrich Wänke and Gerlind Dreibus