With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Paris hosts the French Open at Roland Garros Stadium.
text_B: Sony Xperia T -LRB- renamed Sony Xperia TL in the United States -RRB- is an Android smartphone manufactured by Sony Mobile .. Sony Mobile. Sony Mobile. Sony Xperia. Xperia. Android. Android ( operating system ). smartphone. smartphone
not_related.