Sentence 1: Babs was a rare breed of tiger. 
 Sentence 3: With no male tigers around, Babs might die without producing a cub 
 Sentence 4:  A male was recently found in the wild 
 Sentence 5:  The male tiger and Babs could now produce offspring 
 Option 1: Babs was the last of her kind. 
 Option 2: Babs was one of many kinds of tigers in the world.