With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Voice involves contestants competing for a prize.
text_B: Cara Sucia River is a river of El Salvador .. El Salvador. El Salvador. Cara Sucia. Cara Sucia ( Mesoamerican site ). It arises in the foothills of the Parque Nacional El Imposible and flows westward through the area of Cara Sucia in the Ahuachapan Department region to a bay near El Zapote .. Parque Nacional El Imposible. El Imposible National Park. Cara Sucia. Cara Sucia ( Mesoamerican site ). Ahuachapan Department. Ahuachapan Department. El Zapote. El Zapote
not_related.