With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Elizabeth II has been a queen since 6 February 1652.
text_B: In chemistry , homogeneous catalysis is catalysis in a solution by a soluble catalyst .. catalysis. catalysis. Strictly speaking , homogeneous catalysis refers to catalytic reactions where the catalyst is in the same phase as the reactants .. catalysis. catalysis. Homogeneous catalysis applies to reactions in the gas phase and even in solids .. catalysis. catalysis. Heterogeneous catalysis is the alternative to homogeneous catalysis , where the catalysis occurs at the interface of two phases , typically gas-solid .. catalysis. catalysis. Heterogeneous catalysis. Heterogeneous catalysis. The term is used almost exclusively to describe solutions and often implies catalysis by organometallic compounds .. catalysis. catalysis. The area is one of intense research and many practical perceived applications , e.g. , the production of acetic acid .. acetic acid. acetic acid. Enzymes are examples of homogeneous catalysts .
not_related.