Complex sentence: The Second Foundation was founded by Hari Seldon as a budding colony of mentalics, people with telepathic abilities, located at "Star's End", a planet vaguely referred to by Seldon.
Split into simpler sentences: The Second Foundation was founded by Hari Seldon as a budding colony of mentalics, people with telepathic abilites. Located at "Star's End" a planet vaguely referred to by Seldon.