Rule reminder
When the dislocated element is a prepositional phrase: 'a + person' → gli/le; 'di + thing' → ne (partitive/about it); 'su + topic' → ne (about it, ci for location); 'in + place' → ci. These clitics absorb the preposition — do NOT repeat it with the clitic.
'Di quella vicenda, ___ so molto poco.' What is the correct clitic?