With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Second Punic War involved combatants in the Mediterranean.
text_B: Priscansermarinus barnetti is an organism known from the Middle Cambrian Burgess Shale , which probably represents a species of lepadomorph barnacle .. Middle Cambrian. Middle Cambrian. Burgess Shale. Burgess Shale. barnacle. barnacle. Four specimens of P. barnetti are known from the Greater Phyllopod bed .. Greater Phyllopod bed. Phyllopod bed
not_related.