What concepts are described in the following sentence?

"Alan Bean is a US national who was a member of the Apollo 12 crew (operated by NASA). The back up pilot was Alfred Worden and the commander was David Scott."

Return the answer as pairs of triples.
Apollo 12 BACKUP_PILOT Alfred Worden
Alan Bean WAS_A_CREW_MEMBER_OF Apollo 12
Alan Bean NATIONALITY United States
Apollo 12 OPERATOR NASA
Apollo 12 COMMANDER David Scott