What are the keywords in the following sentence? fans paid tribute to football player when they unfurled a huge banner on saturday
banner, fan, tribute, unfurl

What are the keywords in the following sentence? community leaders cut the ribbon .
cut, leader, ribbon

What are the keywords in the following sentence? A passenger tram traveling along the railroad tracks.
track, tram, travel

What are the keywords in the following sentence? The ending credits run over a man playing piano.
credit, end, run