id	keyword
app01-5668	concrete
app01-5668	ash
app01-5668	resistance
app01-5668	series
app01-5668	fly
app01-5668	air
app01-5668	chemical
app01-5668	thaw
app01-5668	content
app01-5668	substances
app01-5668	strength
app01-5668	cycles