What are the keywords in the following sentence? building reflection in the windows
build, reflection, window

What are the keywords in the following sentence? monarch is greeted by religious leader on his arrival for their meeting .
leader, meeting, monarch

What are the keywords in the following sentence? interior of old church in monastery dark interior with rays of light shining through the window
church, light, ray

What are the keywords in the following sentence? punching numbers into a calculator
calculator, number, punch