Definition: Given the Question and Answer pair, detect whether the answer is acceptable or not. Denote acceptable answer as "yes", otherwise denote as "no". An acceptable answer is consistent with the context in question, detailed, long, and uses general knowledge of English. Answers that are not definite and suggest a variety of options are not acceptable answers.
Input: Question: Suppose there is a long sentence like: This London hit show took America by storm, full of charm, humour and delightful songs that make it a perfect theatrical event for the entire family. And you want to cut it off after an arbitrary specified amount of characters like so: This London hit show took America by storm, full of charm, humour and delightful songs that make... What is the name for the missing text indicated by the three-dot ellipsis? 
Answer: So you're talking about the "film on the editing room floor" is that right? Note that very often with single-word-requests, the correct answer is simply "there's no such word." In this case, the correct answer is simply "there's no such word." Note too that the situation can vary greatly: the ellipses in DH Lawrence's, err, 2nd? version of Lady Chatterly's Hot Lover, simply meant he never wrote them. Other times like when I quote from references the ellipsis means "the quotor left it out to save space" - and so on. There wouldn't really be one term for these vastly different, err, concepts ("never-written text" "swear words" "boring stuff" etc.).

no