Sentence 1: Jeff liked to walk his dog around the pond at the park. 
 Sentence 3: He quickly ran into the pond 
 Sentence 4:  The dog could not swim 
 Sentence 5:  Jeff had to dive into the cold water to rescue his dog 
 Option 1: One day during their walk the dog tried to escape from his leash but could not. 
 Option 2: One day during their walk the dog escaped from his leash.