Our method for extracting sentences for PSTS is inspired by bilingual pivoting (Bannard and Callison-Burch, 2005), which discovers samelanguage paraphrases by ''pivoting'' over bilingual parallel corpora.
we use BERT in its configuration for sentence pair classification tasks, where the input consists of two tokenized sentences (c t and c w ), preceded by a [CLS] token and separated by a [SEP] token.