What are the keywords in the following sentence? modern commuter train crossing the bridge in the city .
bridge, city, cross, train

What are the keywords in the following sentence? An assortment of different pizzas with different toppings laid out on a counter top.
assortment, pizza, topping

What are the keywords in the following sentence? Several trucks and buses that are parked in a large garage.
bus, garage, park, truck

What are the keywords in the following sentence? still partially raised after allowing a boat to pass
boat, pass, raise