With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Kafka stars an actor.
text_B: Juan Carlos Castilla Zenobi -LRB- Chile 1940 -RRB- is a marine biologist .. He received his PhD from the University of Wales .. University of Wales. University of Wales. Since 1965 , he has been a faculty member at the Pontificia Universidad Catolica de Chile .. Pontificia Universidad Catolica de Chile. Pontificia Universidad Catolica de Chile. In 1985 , he published a paper on a study which focused on a part of the Chilean coastline from which humans had been excluded .. He is a recipient of the 1996 TWAS Prize .. TWAS Prize. TWAS Prize
not_related.