Question: What nationality is the scientist who along with Antony Hewish discovered PSR B1919+21 ?
Sentence (from "PSR B1257+12 A"): PSR B1257+12 b, alternatively designated PSR B1257+12 A, also named Draugr, is an extrasolar planet approximately 2,300 light-years away in the constellation of Virgo.
Relevant evidence: No