With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Joy is a singer.
text_B: Masamitsu -LRB- written  : 正光 , 正満 , 成光 , 政光 , 将光 or 雅光 -RRB- is a masculine Japanese given name .. Notable people with the name include  :. , Japanese baseball player. , Japanese daimyo. , Japanese sport wrestler. , Japanese footballer. , Japanese footballer. , Japanese politician. , Japanese politician. , Japanese scientist. , Japanese printmaker. , Japanese Go player
not_related.