Number of "On-topic", "Off-topic" and “Undecidable” Tweets and the required information items that contributed to the determination of the topical relevance.

The interpretation basis percentages in each row add up to more than 100% as multiple information items may have contributed to the decision on topical relevance. Linked URLs, user profiles and ensuing conversations were also considered as a potential interpretation basis, but were not required for this dataset.