With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Antarctica is the largest continent.
text_B: Catephia lobata is a species of moth of the family Erebidae .. moth. moth. Erebidae. Erebidae. It is found in Indonesia -LRB- Sumatra -RRB- .. Indonesia. Indonesia. Sumatra. Sumatra
not_related.