Table 1. Data description and basic network characteristics.

Data	Period	Raw data			Extracted network
		#users	#tweets	#links	#nodes		s	c
TP-JP	before	36,893	42,678	23,444	3,647	2.8	2,791	0.06
	after	36,893	114,247	112,004	3,647	5.7	3,191	0.09
TP-EN	before	36,234	49,095	36,394	4,037	2.6	3,261	0.09
	after	36,234	64,507	49,142	4,037	2.9	3,417	0.09
Global	before	7,403,050	6,184,122	4,191,050	87,939	2.0	40,568	0.07
	after	7,403,050	8,062,823	5,545,562	87,939	2.1	38,552	0.07

: average degree; s: size of giant connected component or giant strongly connected network; c: clustering coefficient.