Question: Who was the director that directed both Jennifer Carpenter and Mattie Liptak? 
Sentence (from "Quarantine (2008 film)"): Quarantine is a 2008 American found-footage horror film directed and co-written by John Erick Dowdle, produced by Sergio Aguero, Doug Davison, and Roy Lee, and co-written by Drew Dowdle, being a remake of the Spanish film "REC".
Relevant evidence: Yes