Assertion: tetrahedron's triangle | /r/HasProperty | given by grimm
Facets:
value: in 1928
type: TEMPORAL
Source sentences:
text: Since writing the 1995 article I have discovered that the first bond-type triangle was actually given by Fernelius and Robey in 1935 rather than by van Arkel and was, in turn, partially anticipated by an even earlier triangle given by Grimm in 1928.