With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Michael McCullers is a filmmaker.
text_B: Photochrom -LRB- Fotochrom , Photochrome or the Aac process -RRB- is a process for producing colorized images from black-and-white photographic negatives via the direct photographic transfer of a negative onto lithographic printing plates .. colorized. hand-colouring of photographs. lithographic. Lithography. The process is a photographic variant of chromolithography -LRB- color lithography -RRB- .. chromolithography. chromolithography
not_related.