With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Doctor is a pilot.
text_B: Vinyl siding is plastic exterior siding for a house , used for decoration and weatherproofing , imitating wood clapboard , and used instead of other materials such as aluminum or fiber cement siding .. siding. siding. clapboard. clapboard ( architecture ). aluminum. aluminum siding. fiber cement siding. fiber cement siding. It is an engineered product , manufactured primarily from polyvinyl chloride -LRB- PVC -RRB- resin .. polyvinyl chloride. polyvinyl chloride. In the UK and New Zealand a similar material is known as uPVC weatherboarding .. New Zealand. New Zealand. weatherboarding. weatherboarding. Approximately 80 percent of its weight is PVC resin , with the remaining 20 percent being ingredients that impart color , opacity , gloss , impact resistance , flexibility , and durability .. It is the most commonly installed exterior cladding for residential construction in the United States and Canada .
not_related.