With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Lucas is exclusively a tragic film.
text_B: Lucas. is a 1986 American teen tragicomedy film directed by David Seltzer and starring Corey Haim , Kerri Green , Charlie Sheen and Courtney Thorne-Smith .. David Seltzer. David Seltzer. Corey Haim. Corey Haim. Charlie Sheen. Charlie Sheen. Kerri Green. Kerri Green. Courtney Thorne-Smith. Courtney Thorne-Smith. tragicomedy. tragicomedy. The film was Winona Ryder 's screen debut .. Winona Ryder. Winona Ryder
related.