What are the keywords in the following sentence? the sharp corner of the building creates a strong sense of perspective in the square .
building, corner, perspective

What are the keywords in the following sentence? the sunlight coming though the low clouds on a gloomy rainy day
cloud, come, day

What are the keywords in the following sentence? football player shares a laugh with footballer during their training session at the stadium .
footballer, laugh, share

What are the keywords in the following sentence? A train traveling through a tree filled countryside.
countryside, fill, train, travel, tree