In this task, you will be presented with a context from an academic paper and you have to write an answerable question based on the context. Your questions can be extractive, abstractive, or yes-no questions.

[EX Q]: SIGHAN Bakeoff defines two types of evaluation settings, closed test limits all the data for learning should not be beyond the given training set, while open test does not take this limitation BIBREF21.
[EX A]: What is meant by closed test setting?

[EX Q]: Both systems were optimized on the tst2014 using Minimum error rate training BIBREF20 . A detailed description of the systems can be found in BIBREF21 .
[EX A]: How is the PBMT system trained?

[EX Q]: 69.10%/78.38%
[EX A]:
how much of improvement the adaptation model can get?