TwitIE also outperforms Ritter's Twitter NER algorithm (Ritter et al., 2011) and our adaptation of the Stanford NER, which we trained using both tweets and newswire (see (Derczynski et al., 2013a) for details).
as shown in Table 1, when compared against state-of-the-art NER performance on longer news content, an overall F1 score of 80% leaves notable amounts of missed annotations and false positives.