koreanhistory1-11, Exercise 2: Three disputed rows (a sample; yours will differ)

Model answer:

1. Samguk yusa date (1280, 1281 or 1285). Owners: three Wikipedia articles (Korean Literature 1's source, History of Korea, others). Why they differ: later chronicles are dated by compilation tradition, not a signed date. A further source: a scholarly edition of the text or a Korean heritage-agency entry for the work.
2. March First deaths (798 to 7,509). Owners: the 2019 NIKH database (conservative, 798 to 1,170), Park Eun-sik 1920 (7,509), Japanese officials (553 killed to 11 April). Why they differ: methods and motives; the article says Japanese records were politically altered. A further source: the original database or Park's 1920 volume, and a cross-check of the table sums.
3. Gwangju deaths (165 to 2,300). Owners: the government (165 per the lead, but the same figure is the Family Association's in the section), early Martial Law Command figures (144, 22, 4), the Family Association, scholarship (600 to 2,300, or 1,000 to 2,000). Why they differ: the Command made disputing its figures grounds for arrest; scholars count deaths above averages. A further source: the 2020 Truth Commission's findings.