Microblog Hashtag Generation via Encoding Conversation Contexts
Table 5: ROUGE-1 F1 scores (%) in producing unseen hashtags. Best results are in bold.
['[BOLD] Model', '[BOLD] Twitter', '[BOLD] Weibo']
To further explore the extreme situation where hashtags are absent in the training set, we experiment to see how models perform in handling new hashtags. To this end, we additionally collect instances tagged with hashtags absent in training data and construct an external test set, with the same size as our original test set.