Complex sentence: Following his recovery the now unemployed Chaplin is arrested as an instigator in a Communist demonstration since he was waving a "red" flag that fell off a delivery truck (Chaplin intended to return the flag to the driver).
Split into simpler sentences: Following his recovery, the now unemployed Chaplin is arrested as an instigator in a Communist demonstration. He was waving a "red" flag that fell off a delivery truck (Chaplin intended to return the flag to the driver).