With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Mark Zuckerberg plays sport for a team called Facebook.
text_B: Rafael Anibal Infantino Abreu -LRB- born August 28 , 1984 in La Vega Province -RRB- is a Colombian cyclist riding for EPM-UNE-Area Metropolitana .. La Vega Province. La Vega Province. EPM-UNE-Area Metropolitana. EPM-UNE-Area Metropolitana. EPM-UNE. EPM-UNE-Area Metropolitana
not_related.