 However, domain adaptation  between distant domains (e.g.,  subtitles and research papers) does not perform effectively because of mismatches in vocabulary;
<coherence>  However, domain adaptation  between distant domains (e.g.,  subtitles and research papers) does not perform effectively because of mismatches in vocabulary;
 However, domain adaptation between distant domains (e.g., subtitles and research papers) , however, cannot be performed effectively due to mismatches in vocabulary;