Complex sentence: They spend an afternoon with an elderly blind American man, played by Levon Helm, who listens to Mexican radio for company who asks them to shoot him since there is no one left to take care of him.
Split into simpler sentences: They spend an afternoon with an elderly blind American man (Levon Helm), who listens to Mexican radio for company. The man asks to be shot since there is no one left to take care of him.