What are the keywords in the following sentence? trains and cars had to battle the conditions high up in the hills
battle, car, condition

What are the keywords in the following sentence? wide pedestrian walkway leading towards the beach and sea from the smart town
lead, sea, walkway

What are the keywords in the following sentence? dried trees under blue sky at the forest in winter
forest, tree, winter

What are the keywords in the following sentence? aerial drone footage flying over a forest in morning sunlight
fly, forest, sunlight