With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Macaulay Culkin was an actor.
text_B: Interior Semiotics was a 2010 performance by Natacha Stolz -LRB- also known as Gabbi Colette -RRB- at FOREVER -LRB- 21 -RRB- , an apartment gallery event in West Town , Chicago .. event. Happening. The performance was videotaped and uploaded to YouTube , where it went viral after being posted on 4chan , then got over 2 million views .. YouTube. YouTube. 4chan. 4chan
not_related.