id	keyword
educationr-1557	historia
educationr-1557	los
educationr-1557	que
educationr-1557	del
educationr-1557	las
educationr-1557	por
educationr-1557	una
educationr-1557	enseñanza
educationr-1557	más
educationr-1557	escolar
educationr-1557	manuales
educationr-1557	con
educationr-1557	como
educationr-1557	españa