id	keyword
bece-761	schools
bece-761	teachers
bece-761	education
bece-761	program
bece-761	hometown
bece-761	china
bece-761	county
bece-761	position
bece-761	effects
bece-761	normal
bece-761	supply
bece-761	model
bece-761	village
bece-761	variable
bece-761	teaching