With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Plantation era was a period in the history of only the northern United States.
text_B: Trichomecyna fuscovittata is a species of beetle in the family Cerambycidae , and the only species in the genus Trichomecyna .. Cerambycidae. Cerambycidae. Trichomecyna. Trichomecyna. beetle. beetle. It was described by Breuning in 1939 .. Breuning. Stephan von Breuning ( entomologist )
not_related.