What are the keywords in the following sentence? number of protons in the nucleus of an atom
atom, nucleus, number, proton

What are the keywords in the following sentence? a ferry coming into harbour
come, ferry, harbour

What are the keywords in the following sentence? young colt staying close to mother grazing fresh grass in a paddock
grass, graze, mother, paddock, stay

What are the keywords in the following sentence? pilgrims praying on the main yard near the big temple
pilgrim, pray, temple