What are the keywords in the following sentence? the clouds looked like they were on fire .
cloud, fire, look

What are the keywords in the following sentence? good example of how the rocks weather at different rates depending on their formation .
example, formation, rock

What are the keywords in the following sentence? shot of herd of goats grazing in a field .
field, goat, graze

What are the keywords in the following sentence? mist lies in a valley at sunrise .
lie, mist, sunrise, valley