id	keyword
fce-4476	knowledge
fce-4476	teacher
fce-4476	students
fce-4476	teaching
fce-4476	pck
fce-4476	mtu2
fce-4476	content
fce-4476	mtr1
fce-4476	education
fce-4476	lca
fce-4476	use
fce-4476	mathematics