Table 3.

Sample topics and their top-10 terms

ID	Top-10 terms	Topic
(a) English news
E22	gates, bill, bill gates, depopulation, vaccine, billgatesbioterrorist, his, he, foundation, gates foundation	Bill Gates
E14	vaccine, vaccines, covid, covid vaccine, more, covid vaccines, mrna, dose, vaccinated, get	COVID-19 vaccine
E9	China, Chinese, coronavirus, Wuhan, in Wuhan, in China, the coronavirus, virus, video, bats	Virus origin
(b) Chinese news
C2	神山(Shenshan), 医院(Hospital), 一线(frontline), 神山 医院 (Shenshan hospital), 武汉(Wuhan), 医疗(medical), 英雄 (hero), 医疗队(medical team), 军舰 (naval ship), 湖北 (Hubei)	Shenshan hospital
C6	口罩(face mask), 消毒剂(sanitizer), 消毒(sanitizing), 洗手 (handwashing), 佩戴(wear), 清洗(wash), 医用 口罩 (medical mask), 接触(contact), 防护(protection), 酒精 (alcohol)	Protective measures
C9	疫苗(vaccine), 病毒(coronavirus), 研究(research), 抗体 (antibody), 蛋白(protein), 突变(mutation), 研发(R&D), 临床试验 (clinical trial), 灭活疫苗 (inactivated vaccine), 检测 (testing)	COVID-19 vaccine