Complex sentence: Slashdot's editors are primarily responsible for selecting and editing the primary stories daily from submitters; they provide a one-paragraph summary for each and a link to an external site where the story originated.
Split into simpler sentences: Slashdot's editors are primarily responsible for selecting and editing the primary stories that are posted daily by submitters. The editors provide a one-paragraph summary for each story and a link to an external website where the story originated.