instruction:
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.
question:
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.
answer:
sandwich panel


question:
lee soo-young (born lee ji-yeon april 12, 1979) is a korean ballad singer.
answer:
lee soo-young


question:
robert chartoff (august 26, 1933 – june 10, 2015) was an american movie producer and philanthropist.
answer:

robert chartoff