With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Beatles were a country band.
text_B: Spinocerebellar ataxia type 6 -LRB- SCA6 -RRB- is a rare , late-onset , autosomal dominant disorder , which , like other types of SCA , is characterized by dysarthria , oculomotor disorders , peripheral neuropathy , and ataxia of the gait , stance , and limbs due to cerebellar dysfunction .. autosomal dominant. autosomal dominant. SCA. Spinocerebellar ataxia. dysarthria. dysarthria. peripheral neuropathy. peripheral neuropathy. ataxia. ataxia. Unlike other types , SCA 6 is not fatal .. SCA. Spinocerebellar ataxia. This cerebellar function is permanent and progressive , differentiating it from episodic ataxia type 2 -LRB- EA2 -RRB- where said dysfunction is episodic .. ataxia. ataxia. episodic ataxia. episodic ataxia. In some SCA6 families , some members show these classic signs of SCA6 while others show signs more similar to EA2 , suggesting that there is some phenotypic overlap between the two disorders .. SCA6 is caused by mutations in CACNA1A , a gene encoding a calcium channel α subunit .. calcium channel. calcium channel. These mutations tend to be trinucleotide repeats of CAG , leading to the production of mutant proteins containing stretches of 20 or more consecutive glutamine residues ; these proteins have an increased tendency to form intracellular agglomerations .. glutamine. glutamine. Unlike many other polyglutamine expansion disorders expansion length is not a determining factor for the age that symptoms present .
not_related.