What are the keywords in the following sentence? A passenger plane that is pulled into a terminal.
plane, pull, terminal

What are the keywords in the following sentence? A train traveling full speed down the tracks.
speed, train, travel

What are the keywords in the following sentence? protected site featuring a park as well as children
feature, protect, site

What are the keywords in the following sentence? circular staircase leads to the grand dining room in the building .
building, lead, staircase