Simplify the following text for a Grade 6 native English-speaking person.
Original: Dr. Tenenbaum and her Little Sisters help Jack escape through the vent system , where he falls and loses consciousness . When Jack awakens , Dr. Tenenbaum has already deactivated some of his conditioned responses ( such as the trigger phrase itself ) and assists him in breaking the remaining ones , among them one that would have eventually stopped his heart .
Simplified: When Jack awakens , Dr. Tenenbaum has already turned off the trigger phrase .