What are the keywords in the following sentence? comedian lived and died at home while surrounded by his children and wife
comedian, home, wife

What are the keywords in the following sentence? an image of an ancient letter in black ink on yellow paper
image, letter, paper

What are the keywords in the following sentence? plane taking off at airport flying over the sea and desert
airport, plane, sea

What are the keywords in the following sentence? futurist structure rises above the city
city, rise, structure