Detailed Instructions: 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.
Q: While the performances of a purely content-based model naturally stays stable, the performance of the other systems decrease notably they perform worse than the content-based model.
A:
How do they demonstrate the robustness of their results?