With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Missing is directed by French director Costa-Gavras.
text_B: Kristin Lewis -LRB- born 1975 , Little Rock , Arkansas -RRB- is a lyrico-spinto soprano , known for her Verdi repertoire .. soprano. soprano. Verdi. Giuseppe Verdi. She has performed in many opera houses around the world , and is based in Vienna , where she continued her studies with opera singer Carol Byers .. Vienna. Vienna. Carol Byers. Carol Byers ( opera singer )
not_related.