What are the keywords in the following sentence? traffic passing under late gothic revival structure
pass, structure, traffic

What are the keywords in the following sentence? abc written on a blackboard with books and apple in front
apple, blackboard, front

What are the keywords in the following sentence? the trunk of a tree with roots in green moss in the forest
root, tree, trunk

What are the keywords in the following sentence? a city has been closed as hundreds of fans gather ahead of the quarter final
city, fan, hundred