Task: Question Generation
Input (English): We apply our adaptively sparse Transformers on four machine translation tasks.  IWSLT 2017 German $\rightarrow $ English BIBREF27: 200K sentence pairs.

KFTT Japanese $\rightarrow $ English BIBREF28: 300K sentence pairs.

WMT 2016 Romanian $\rightarrow $ English BIBREF29: 600K sentence pairs.

WMT 2014 English $\rightarrow $ German BIBREF30: 4.5M sentence pairs.
Output (English): What tasks are used for evaluation?