id	keyword
cet-14337	track
cet-14337	rail
cet-14337	transport
cet-14337	footprint
cet-14337	material
cet-14337	co2
cet-14337	structure
cet-14337	embedding
cet-14337	hungary
cet-14337	use
cet-14337	ustm
cet-14337	emissions