Complex sentence: In 2382 the "USS Excelsior" is docked at Starbase 911, which orbits Union III, a class M world located near a wormhole "constructed in ancient times by the extinct" as a route to the Delta Quadrant.
Split into simpler sentences: In 2382 the "USS Excelsior" is docked at Starbase 911, which orbits Union, a class M world. The starbase is located near a wormhole "constructed in ancient times by the extinct" as a route to the Delta Quadrant.