Question: Dr Donald John Pinkava, is a botanist, specialising in cacti and succulents, and he is the discoverer of some of their varieties, at which public metropolitan research university on five campuses across the Phoenix metropolitan area, and four regional learning centers throughout Arizona, he has which position?
Sentence (from "Donald John Pinkava"): Dr Donald John Pinkava (born 1933) is a botanist, specialising in cacti and succulents, and he is the discoverer of some of their varieties.
Relevant evidence: No