The zoo opened in 1913 and was designed with enclosures rather than cages, an idea that was new at the time.
The zoo opened in 1913 and was designed to solely use cages.
mnli hypothesis: The zoo opened in 1913 and was designed to solely use cages. premise: The zoo opened in 1913 and was designed with enclosures rather than cages, an idea that was new at the time.