With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Tony Bill spearheaded a film taking its basis from  a book.
text_B: Less Than Zero may refer to  :. `` Less Than Zero '' -LRB- song -RRB- , a 1977 song by Elvis Costello. Less Than Zero -LRB- novel -RRB- , a 1985 novel by Bret Easton Ellis. Less Than Zero -LRB- film -RRB- , a 1987 film by Marek Kanievska. Less Than Zero -LRB- soundtrack -RRB- , the soundtrack to the 1987 film. Less Than Zero -LRB- album -RRB- , a 2005 album by LA Symphony. Any negative number. negative number. negative number
related.