Table 12. Classification of datasets for fake news detection according to the extraction period.

		Dataset	# Of datasets
Extraction period	Defined	CREDBANK, BuzzFace, FacebookHoax, LIAR, Benjamin Political News, BuzzFeed News, Spanish fake news, NELA-GT-2018, TW_info, FCV-2018, Verification Corpus, CNN/Daily Mail summarization dataset, Tam et al.’s dataset	13
	Not-defined	Yelp dataset, PHEME, Fact checking, FEVER, EMERGENT, FakeNewsNet, Burfoot Satire News, Ott et al.’s dataset, MisInfoText, FNC-1, Fake_or_real_news, TSHP-17, Qprop, Zheng et al.’s dataset,	14