Given the task definition and input, reply with output. In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.

Article: Is your family interested in buying a dog? A dog can be a pleasant companion to your family, but if you choose the wrong kind of dog , you will have a lot of troubles. Families should sit down and discuss the possible problems before buying a dog. Even if the children in your family are the ones who want the dog, the parents are the ones who are really responsible for seeing that the animal is properly cared for. If you don't know much about dogs, it is a good idea to go to the library for books about different kinds of dogs, and books about how to train a young dog. In reading about the different breeds you should know that a dog described as very alert may be too active. When a book describes a dog as an excellent hunting dog, it probably means that the dog won't be happy living in a small house. Dog breeds vary in popularity as the years go by. One of the most popular dogs these days is the German shepherd. This is because it provides protection as well as companionship. The family should be warned that these dogs grow up to be very big, and may be too powerful for children to control. If space is limited, a toy dog may be a good choice. These dogs are very small and easy to train. They don't need to be walked daily, since they can exercise in the home.
Answer: by reading books about dogs
According to the passage, one can get information about different kinds of dogs _ .