Complex sentence: The 1954 season saw Velbazhd make their first appearance in the top flight of Bulgarian football, but at the end of the season they were relegated back to the B PFG, finishing on 12th place.
Split into simpler sentences: The 1954 season saw Velbazhd make their first appearance in the top flight of Bulgarian football. This first season was less successful and they were relegated back to the B PFG, finishing on 12th place.