id	keyword
gc-929	grade
gc-929	estimation
gc-929	method
gc-929	grade estimation
gc-929	data
gc-929	deviation
gc-929	point
gc-929	image
gc-929	training
gc-929	li2o
gc-929	ta2o5
gc-929	ore
gc-929	ore grade
gc-929	variogram
gc-929	ta2o5 grade
gc-929	li2o grade
gc-929	number
gc-929	model