With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Lady Gaga is an American singer, songwriter, and actress.
text_B: Ivaylo Sokolov -LRB- born 15 September 1984 -RRB- is a Bulgarian footballer who plays for Nesebar as a defender .. Nesebar. PFC Nesebar. footballer. football ( soccer ). He previously played in the A PFG for Marek Dupnitsa .. Marek Dupnitsa. PFC Marek Dupnitsa. A PFG. A PFG
not_related.