What are the keywords in the following sentence? lake surrounded by mountain range
lake, range, surround

What are the keywords in the following sentence? A group of planes sitting on a runway, in the day.
day, plane, runway, sit

What are the keywords in the following sentence? The pizza has olives, cheese, sauce and dough.
dough, pizza, sauce

What are the keywords in the following sentence? a farmer is harvesting his crop
crop, farmer, harvest