Complex sentence: Green began his career in 1995 as an editor at the satirical weekly The Onion and was a staff writer from 2000 to 2001 at "The American Prospect".
Split into simpler sentences: Green began his journalism career in 1995 as an editor at the satirical weekly "The Onion". From 2000 to 2001, he was a staff writer at "The American Prospect".