With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: A Song of Ice and Fire is by a person born after 1948.
text_B: 7-epi-alpha-selinene synthase is an enzyme with systematic name -LRB- 2E ,6 E -RRB- - farnesyl-diphosphate diphosphate-lyase -LRB- 7-epi-alpha-selinene-forming -RRB- .. enzyme. enzyme. systematic name. List of enzymes. diphosphate. diphosphate. This enzyme catalyses the following chemical reaction. enzyme. enzyme. catalyses. catalysis. chemical reaction. chemical reaction. -LRB- 2E ,6 E -RRB- - farnesyl diphosphate 7-epi-alpha-selinene + diphosphate. diphosphate. diphosphate. The recombinant enzyme from Vitis vinifera forms - valencene and -7 - epi-alpha-selinene .. enzyme. enzyme. Vitis vinifera. Vitis vinifera
not_related.