Question: Claude Nicollier and André Kuipers were both astronauts of which space agency?
Sentence (from "Claude Nicollier"): During his final spaceflight he participated in a spacewalk, becoming the first European Space Agency astronaut to do so during a Space Shuttle mission (previous ESA astronauts conducted spacewalks aboard "Mir", see List of spacewalks and moonwalks 1965–1999).
Relevant evidence: Yes