Question: Who died first, Rodolfo Choperena or Harry George Drickamer?
Sentence (from "Harry George Drickamer"): He then combined work with study of physics and quantum mechanics, and in February 1946 returned to the University of Michigan for one term to receive his Ph.D. Drickamer joined the University of Illinois at Urbana- Champaign, where he subsequently remained for his entire professional career.
Relevant evidence: No