With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Lonesome Dove's cast included only Peruvian women.
text_B: Tabernaemontana thurstonii is a species of plant in the Apocynaceae family .. Apocynaceae. Apocynaceae. Tabernaemontana. Tabernaemontana. plant. plant. It is endemic to Fiji .. endemic. Endemism. Fiji. Fiji
not_related.