With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Albert Einstein developed one of the two pillars of modern architecture.
text_B: Theanine -LSB- ˈθiːəniːn -RSB- , also known as L-γ-glutamylethylamide and N5-ethyl-L-glutamine , is an amino acid analogue of the proteinogenic amino acids L-glutamate and L-glutamine and is found primarily in particular plant and fungal species .. amino acid. amino acid. analogue. Structural analog. plant. phytochemical. fungal species. fungi. It was discovered as a constituent of green tea in 1949 and in 1950 was isolated from gyokuro leaves , which have high theanine content .. green tea. green tea. gyokuro. gyokuro. Appearance of the name `` theanine '' without a prefix is understood to imply the L-enantiomer , which is the form found in fresh teas and in some dietary supplements .. enantiomer. enantiomer. The opposite D-enantiomer has far fewer studied pharmacologic properties , but is present in racemic chemical preparations , and substantially in some studied theanine supplements .. enantiomer. enantiomer. In Japan , L-theanine has been approved for use in all foods , including herb teas , soft drinks , desserts , etc. , with some restrictions applying to infant foods .. It provides a unique brothy or savory -LRB- umami -RRB- flavor to green tea infusions .. green tea. green tea. umami. umami. As an ingredient , it is generally recognized as safe -LRB- GRAS -RRB- by the Food and Drug Administration -LRB- FDA -RRB- , and is sold as a dietary supplement in the US .. dietary supplement. dietary supplement. generally recognized as safe. generally recognized as safe. Food and Drug Administration. Food and Drug Administration. However , the German Federal Institute for Risk Assessment , an agency of their Federal Ministry of Food and Agriculture , has objected to the addition of isolated theanine to beverages .. Federal Ministry of Food and Agriculture. Federal Ministry of Food and Agriculture. The European Food Safety Authority EFSA advised negatively on health claims related to L-theanine and cognitive function , alleviation of psychological stress , maintenance of normal sleep , and reduction of menstrual discomfort .. European Food Safety Authority. European Food Safety Authority. Therefore , health claims for L-theanine are prohibited in the European Union .
not_related.