The key answer of exercise 1

One great problem for prison inmates, who spend most of their time locked up, is how to develop self-esteem and find a purpose to their days. One idea, which has been piloted at a prison in Washington, US, is to get the inmates to train dogs that will eventually help disabled people. The project has been a great success. The relationship between the inmates and the warders who work at the prison has improved considerably. Many of the inmates, when they leave the prison, go on to work with animals.

In another scheme, Pilot Dogs, a company which trains dogs for the blind in Ohio, US, put five dogs into the hands of prison inmates, who trained the dogs successfully.