With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Dark Knight was released six weeks after Ledger's death.
text_B: Iurubanga arixi is a species of beetle in the family Cerambycidae , and the only species in the genus Iurubanga .. Cerambycidae. Cerambycidae. Iurubanga. Iurubanga. beetle. beetle. It was described by Martins and Galileo in 1996 .
not_related.