With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: An American engineer and entrepreneur founded Lincoln Motor Company.
text_B: In molecular biology , the FasX small RNA -LRB- fibronectin / fibrinogen-binding / haemolytic-activity  /  streptokinase-regulator-X -RRB- is a non-coding small RNA -LRB- sRNA -RRB- produced by all group A Streptococcus .. small RNA. Bacterial small RNA. Streptococcus. Streptococcus. streptokinase. streptokinase. FasX has also been found in species of group D and group G Streptococcus .. Streptococcus. Streptococcus. FasX regulates expression of secreted virulence factor streptokinase -LRB- SKA -RRB- , encoded by the ska gene .. expression. Gene expression. virulence factor. virulence factor. streptokinase. streptokinase. FasX base pairs to the 5 ' end of the ska mRNA , increasing the stability of the mRNA , resulting in elevated levels of streptokinase expression .. expression. Gene expression. streptokinase. streptokinase. base pairs. base pairs. mRNA. mRNA. FasX negatively regulates the expression of pili and fibronectin-binding proteins on the bacterial cell surface .. expression. Gene expression. pili. pilus. bacterial. bacterial. It binds to the 5 ' untranslated region of genes in the FCT-region in a serotype-specific manner , reducing the stability of and inhibiting translation of the pilus biosynthesis operon mRNA by occluding the ribosome-binding site through a simple Watson-Crick base-pairing mechanism .. mRNA. mRNA. translation. Translation ( genetics ). biosynthesis. biosynthesis. operon. operon
not_related.