With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Rafael Nadal won an annual tennis tournament for the eighth time in 2012.
text_B: Ekkapoom Potharungroj -LRB- เอกภม โพธารงโรจน born March 29 , 1985 -RRB- is a professional footballer from Thailand .. Thailand. Thailand. He currently plays for Port F.C. in the Thai League T1 .. Port. Port F.C.. Thai League T1. Thai League T1
not_related.