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: a diode is an electronic component with two electrodes (connectors) that allows electricity to go through it in one direction and not the other direction.

SOLUTION: diode

PROBLEM: gossliwil is a former municipality in the district bucheggberg, in the canton of solothurn, switzerland.

SOLUTION: gossliwil

PROBLEM: mulatto (from spanish "mulato", small mule) is a word referring to a person who is born to one black parent and one caucasian parent.

SOLUTION:
mulatto