The update equations are as follow: In the above equations, w t denotes the t-th word in the background sentences, GRU is defined in equation (19)(20)(21)(22), h t−1 and h t are the hidden representation of w t−1 and w t respectively, l stands for the lead-in sentence encoded by the sentence encoder, • is element-wise multiplication and m t is the computational result of current step.
another nonnegligible task is machine comprehension, also called reading comprehension.