Question: GURPS Banestorm and GURPS Infinite Worlds are setting sourcebooks and supplements for what edition of the GURPS Role-Playing Game?
Sentence (from "GURPS Infinite Worlds"): This was presented in the "Fourth Edition GURPS Basic Set" (and originated in the Third Edition supplements "GURPS Time Travel", "GURPS Alternate Earths", and "GURPS Alternate Earths II").
Relevant evidence: No