0	0.0656	water food uber hiv levels blood independent cells 
1	0.09094	ion art ing music memory reality language plato 
2	0.34278	students social gender time college women education asian 
3	0.10777	city revolution public muslim press soviet social east 
4	0.066	tax system war hunger government pv-battery games systems 
5	0.23894	states war united editor boston college policy ibid 
6	0.05334	u.s china irish china’s durrant april public market 
7	0.34608	women life even man ibid many time death