What are the keywords in the following sentence? cattle graze on a green meadow in summer
graze, meadow, summer

What are the keywords in the following sentence? a donkey fends off a wild dog while protecting a mob of sheep .
dog, protect, sheep

What are the keywords in the following sentence? There is a sporting event going on in a large stadium
event, sport, stadium

What are the keywords in the following sentence? time lapse with sun rising over a city
lapse, rise, sun