Task: Question Generation
Input (English): We introduce a surrogate training objective that avoids these problems and as a result is fully continuous.  Specifically, we form a continuous function softLB that seeks to approximate the result of running our decoder on input INLINEFORM0 and then evaluating the result against INLINEFORM1 using INLINEFORM2 .
Output (English): Do they provide a framework for building a sub-differentiable for any final loss metric?