sentence: Since the 1990s , much of Chomsky 's research has focused on what he calls the Minimalist Program -LRB- MP -RRB- , in which he departs from much of his past research and instead attempts to simplify language into a system that relates meaning and sound using the minimum possible faculties that could be expected , given certain external conditions that are imposed on us independently .
question: what is _ conditioning someone _ _ ?
answers: certain external conditions