With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Winter Passing's title changed to a different name.
text_B: Mateus Costa is the current head coach of Indian I-League side Sporting Clube de Goa .. head coach. manager ( association football ). I-League. I-League. Sporting Clube de Goa. Sporting Clube de Goa
not_related.