id	keyword
eltls-41975	readability
eltls-41975	trend
eltls-41975	genres
eltls-41975	studies
eltls-41975	language
eltls-41975	english
eltls-41975	scores
eltls-41975	fiction
eltls-41975	fre
eltls-41975	change
eltls-41975	linguistics
eltls-41975	texts
eltls-41975	ndc
eltls-41975	sentence