What are the keywords in the following sentence? tourists look out over the city
city, look, tourist

What are the keywords in the following sentence? a wide open yellow field with a big sky and flowers swaying in the breeze
breeze, field, flower, sky, sway

What are the keywords in the following sentence? the staircase leads bedrooms on the first floor
bedroom, lead, staircase

What are the keywords in the following sentence? trail to the top of the world
top, trail, world