Given the task definition and input, reply with output. In this task, you will be presented with a context from an academic paper and a question based on the context. You have to classify the questions into "Extractive", "Abstractive", or "Yes-no" questions. Extractive questions can be answered by concatenating extracts taken from a context into a summary while answering abstractive questions involves paraphrasing the context using novel sentences. Yes-no question is a question whose expected answer is one of two choices, one that affirms the question and one that denies the question. Typically, the choices are either yes or no.

The second series of tests consisted of using all the documents of the subcorpus "specialist" $E$, because the documents of the subcorpus of Annodis are not identical. As far as system evaluations are concerned, we use the 78 $E$ documents as reference. We calculate the precision $P$, the recall $R$ and the $F$-score on the text corpus used in our tests, as follow:
Question: How is segmentation quality evaluated?
Abstractive