With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The September 11 attacks injured over 6,000 people and it was one of the deadliest attacks in U.S. history.
text_B: Television in Senegal was introduced in 1965 .. Television. Television. Senegal. Senegal. introduced in 1965. Timeline of the introduction of television in countries. The following is a list of television channels broadcast in Senegal .. Senegal. Senegal. television. television
not_related.