id	keyword
app01-7993	density
app01-7993	strength
app01-7993	aac
app01-7993	concrete
app01-7993	compressive
app01-7993	energy
app01-7993	masonry
app01-7993	blocks
app01-7993	fracture
app01-7993	moisture
app01-7993	content
app01-7993	tests