With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ben Stiller directed Tropic Thunder in 2008.
text_B: Nios was Altera 's first configurable 16-bit embedded processor for its FPGA product-line .. Altera. Altera. FPGA. FPGA. For new designs , Altera recommends the 32-bit Nios II .. Altera. Altera. Nios II. Nios II
not_related.