Name all the phrases and mentione their functions in this passage. Advertisements are actually very useful though we sometimes feel annoyed when they interrupt our favorite television programs. They provide us with free information on the products and services. There are two types of advertisements. The informative advertisements are the ones which provide us with the details of the products or services. This information is especially useful if the product or service is new. For instance, when we need to buy a computer, advertisements describing the latest models and their different functions would be extremely helpful. However, only a minority of the advertisements are informative ones. Many of them belong to the second category -- the persuasive kind. These advertisements not only tell us more about the products, at the same time, they persuade customers to buy them by claiming that their products are superior to the rivalry ones. These claims may sometimes be untrue.