What are the keywords in the following sentence? A train traveling down tracks net to a bridge.
bridge, track, travel

What are the keywords in the following sentence? tv host and tv programme creator arriving for the premiere
arrive, host, premiere

What are the keywords in the following sentence? high waves smashing against dark cliffs at the pacific coast close
cliff, smash, wave

What are the keywords in the following sentence? the ring has been engraved with his and her names
engrave, name, ring