Complex sentence: The minor planet was named after the discoverer's son, William Patrick Dillon (b.1992), who was present on the discovery night and whose words Daddy, I want to go home now.
Split into simpler sentences: The minor planet was named after the discoverer's son, William Patrick Dillon (b.1992), who was present on the night this minor planet was discovered. His words Daddy, I want to go home now.