What are the keywords in the following sentence? the vaulted ceilings add a nice touch to this room .
add, ceiling, room, vault

What are the keywords in the following sentence? travel and where holiday is one of the most important event to be celebrated
celebrate, holiday, travel

What are the keywords in the following sentence? crew members load vehicles onto ship for the trip .
member, ship, trip

What are the keywords in the following sentence? barge with men traveling at the bridge on a sunny spring day
barge, bridge, travel