Before revision:  This has been widely demonstrated for English using contextualized word representations such as OpenAI GPT (Radford et al., 2018 ), BERT ( Devlin et al., 2019 ), or XLNet ( Yang et al., 2019b).
After revision:  This has been widely demonstrated for English using contextualized word representations such as OpenAI GPT (Radford et al., 2018 ; Howard and Ruder, 2018; Radford et al., 2018; Devlin et al., 2019 ), or XLNet ( Yang et al., 2019b).