What are the keywords in the following sentence? medieval corporation stained glass at the city hall
glass, hall, stain

What are the keywords in the following sentence? A guy in a yellow and red shirt controls a machine.
control, machine, shirt

What are the keywords in the following sentence? baby boy and his mother relaxing in a white bedroom
bedroom, mother, relax

What are the keywords in the following sentence? footballers lift the trophy during their time together
footballer, lift, trophy