With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Cheyenne Jackson starred in a television series.
text_B: Masini Situ-Kumbanga -LRB- born 21 October 1955 -RRB- is a Congolese long-distance runner .. Congolese. Democratic Republic of the Congo. long-distance runner. long-distance track event. He competed in the marathon at the 1984 Summer Olympics .. marathon. Athletics at the 1984 Summer Olympics – Men's marathon. 1984 Summer Olympics. 1984 Summer Olympics
not_related.