What are the keywords in the following sentence? a sea of lost souls
lose, sea, soul

What are the keywords in the following sentence? Two very tasty looking pizzas with toppings near a cutter.
cutter, pizza, topping

What are the keywords in the following sentence? map and sites mentioned in the text
map, site, text

What are the keywords in the following sentence? two people are packing some things into some boxes in a large living room
pack, room, thing