Sentence:  The matter of whether the world needs a fourth Ice Age movie pales beside the question of why there were three before it, but Continental Drift feels less like an extension of a theatrical franchise than an episode of a middling TV cartoon, lolling around on <WSD>territory</WSD> that's already been settled. 
Meaning of the word marked with <WSD> tags:  An area of subject matter, knowledge, or experience.