With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: London was originally named Londinium.
text_B: Ryan Christopher Sitton -LRB- born 1975 -RRB- is a Republican politician and current Texas Railroad Commissioner at the Texas Railroad Commission .. Republican. Republican Party ( United States ). Texas Railroad Commissioner. Texas Railroad Commission. Texas Railroad Commission. Railroad Commission of Texas. A resident of Friendswood outside Houston , Sitton has been serving on the Railroad Commission since November 4 , 2014 .. Friendswood. Friendswood, Texas. Houston. Houston, Texas
not_related.