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: srivilliputhur taluk is a taluk of virudhunagar district of the indian state of tamil nadu.

SOLUTION: srivilliputhur taluk

PROBLEM: a sandwich panel is a kind of composite material, which is usually made of two components: a small outside layer (which is the same on both sides), and an inside layer, which is used to get certain properties, for example insulation or fire resistance.

SOLUTION: sandwich panel

PROBLEM: vehari district is a district in the punjab province of pakistan.

SOLUTION:
vehari district