With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Lonesome Dove is almost the first installment in the Lonesome Dove series.
text_B: Calliostoma tupinamba is a species of sea snail , a marine gastropod mollusk in the family Calliostomatidae .. Calliostomatidae. Calliostomatidae. Calliostoma. Calliostoma. species. species. sea snail. sea snail. gastropod. gastropod. mollusk. mollusk. family. family ( biology )
not_related.