Original sentence: There was a later captive, which lived a year (1996 - 97) in the Shishou Semi-natural Baiji Dolphin Sanctuary (石首半自然白鱀豚保护区) that had been empty since 1990
Edited sentence: There was a later captive, which lived only a year (1996 - 97) in the Shishou Semi-natural Baiji Dolphin Sanctuary (石首半自然白鱀豚保护区) that had been empty since 1990