id	keyword
cice-11517	education
cice-11517	school
cice-11517	american
cice-11517	u.s
cice-11517	table
cice-11517	pisa
cice-11517	students
cice-11517	efficiency
cice-11517	rep
cice-11517	countries
cice-11517	scores
cice-11517	time
cice-11517	poland
cice-11517	hungary
cice-11517	czech