What are the keywords in the following sentence? how the new year is celebrated in different countries of the world
celebrate, country, world

What are the keywords in the following sentence? holiday at the shopping centre which looks deserted this morning
centre, holiday, look

What are the keywords in the following sentence? the grade listed property sits in acres
acre, list, property

What are the keywords in the following sentence? male surgeon interacting with a colleague in hospital corridor
colleague, interact, surgeon