Definition: Rewrite each original sentence in order to make it easier to understand by non-native speakers of English. You can do so by replacing complex words with simpler synonyms (i.e. paraphrasing), deleting unimportant information (i.e. compression), and/or splitting a long complex sentence into several simpler ones. The final simplified sentences need to be grammatical, fluent, and retain the main ideas of their original counterparts without altering their meanings.
Input: Some beverage products such as ales and stouts e. g. Guinness rely on this effect to produce the 'head' on the surface of the poured product.

Some beverages rely on this effect to produce the 'head' on the surface of the poured product. Examples of this are ales and stouts.