With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Naga Chaitanya entered into a legal relationship with Indira Productions.
text_B: Nitrate reductase -LRB- cytochrome -RRB- -LRB- , respiratory nitrate reductase , benzyl viologen-nitrate reductase -RRB- is an enzyme with systematic name ferrocytochrome  : nitrate oxidoreductase .. enzyme. enzyme. systematic name. List of enzymes. ferrocytochrome. ferrocytochrome. This enzyme catalises the following chemical reaction. enzyme. enzyme. catalises. catalysis. chemical reaction. chemical reaction. 2 ferrocytochrome + 2 H + + nitrate 2 ferricytochrome + nitrite. ferrocytochrome. ferrocytochrome. ferricytochrome. ferricytochrome. nitrite. nitrite
not_related.