Table 3. Topics with the highest beta values by subject area

No.	Social science		History		Geography
	Topic 1	Topic 2	Topic 1	Topic 2	Topic 1	Topic 2
	beta	beta	beta	beta	beta	beta
1	Climate	Citizen	History	Region	Education	Climate
	0.0726	0.0296	0.0678	0.0188	0.0892	0.0596
2	Change	Perspective	Narrative	Discussion	Natural disaster	Change
	0.0513	0.0251	0.0239	0.0154	0.0283	0.0503
3	Response	Politics	Problem	Management	Research	Society
	0.0229	0.0237	0.0189	0.012	0.0238	0.0258
4	Era	Disaster prevention	Disaster	Occurrence	Geography	Learning
	0.02	0.0237	0.0189	0.012	0.0204	0.0211
5	Proposition	Catastrophe	Peace	Land	Analysis	Issue
	0.02	0.0207	0.0164	0.012	0.0193	0.0176
6	Learning	Issue	Reflection	Flood	Content	Utilization
	0.02	0.0163	0.0127	0.012	0.0182	0.0176
7	Environment	Development	Consciousness	Locality	Disaster prevention	Student
	0.02	0.0163	0.0127	0.012	0.0170	0.0176
8	Energy	Safety	Humanity	Approach	Environmental education	Based
	0.0172	0.0163	0.0114	0.0103	0.0170	0.0153
9	Research	Sustainability	Description	Natural disaster	Textbook	Human
	0.0125	0.0149	0.0114	0.0103	0.0159	0.0141
10	Analysis	Hazard	Learning	Plague	Process	Earth
	0.0143	0.0134	0.0114	0.0103	0.0159	0.0141