With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Mike Myers died before being in any films by Quentin Tarantino.
text_B: The elegant imperial pigeon , -LRB- Ducula concinna -RRB- also known as blue-tailed imperial-pigeon , is a large -LRB- 43 cm in length -RRB- pigeon , with upperparts mainly dark blue-green in colour with an iridescent sheen .. Ducula. Ducula. Head , neck and underparts are mostly pale grey , with red-brown undertail coverts .
not_related.