With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ben Stiller is an actor.
text_B: Garth Fisher , M.D. -LRB- born September 1 , 1958 -RRB- , is an American plastic surgeon best known as the first doctor selected for the ABC television show Extreme Makeover .. plastic surgeon. Plastic surgery. ABC. American Broadcasting Company. Extreme Makeover. Extreme Makeover. Fisher 's clientele includes entertainers , celebrities and business executives and he specializes in aesthetic / cosmetic plastic surgery of the face , nose , breast and other parts of the body .
not_related.