With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Manitoba shares a border with two US states.
text_B: Lachlan Mitchell born 30 September 1987 in Australia is a rugby union player for Melbourne Rebels in the Super Rugby competition .. rugby union. rugby union. Melbourne Rebels. Melbourne Rebels. Super Rugby. Super Rugby. He plays as a centre wing and fullback .. centre. Rugby union positions#13. Outside centre & 12. Inside centre
not_related.