Question: What element did Carlo Perrier and Emilio Segre discover together?
Sentence (from "Emilio Segrè"): Emilio Gino Segrè (1 February 1905 – 22 April 1989) was an Italian physicist and Nobel laureate who discovered the elements technetium and astatine, and the antiproton, a sub-atomic antiparticle, for which he was awarded the Nobel Prize in Physics in 1959.
Relevant evidence: Yes