Complex sentence: In the early 1980s, Eichhorn met cartoonist Peter Bagge in Seattle, which led to Eichhorn's inclusion in "Weirdo" magazine, which Bagge edited at that time.
Split into simpler sentences: In the early 1980s, Eichhorn met cartoonist Peter Bagge in Seattle. This led to Eichhorn's inclusion in "Weirdo" magazine, which Bagge edited at that time.