SlowGuess/NAACL_2021_OCR huggingface dataset:
where  $p_{\mathrm{r}}$  and  $p_{\mathrm{d}}$  are alignment distributions of the real and distilled data, respectively. Therefore, when  $\mathcal{D} = \mathcal{D}_{\mathrm{st}}$ ,  $\mathcal{F}(\overrightarrow{\mathcal{D}}) = \mathcal{F}(\overleftarrow{\mathcal{D}}) = 0$ , and it was omitted in Table 5.