TASK DEFINITION: Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.
PROBLEM: stornoway airport is an airfield on the outer hebrides isle of lewis.

SOLUTION: stornoway airport

PROBLEM: varicose veins are a condition in which the veins in the leg area have become enlarged.

SOLUTION: varicose veins

PROBLEM: embraer erj family is a series of of twin-engine regional jets produced by embraer.

SOLUTION:
embraer erj family