what something is made of is a public of that something
office_product is tangible_thing. public_square is tangible_thing. marking is tangible_thing. public_service_vehicle is tangible_thing. editorial_office is tangible_thing. public_high_school is tangible_thing. political_office is tangible_thing. man_made_pollution_source is tangible_thing. newspaper_office is tangible_thing.