With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Justinian I was a Byzantine emperor from 527 to 565.
text_B: Erica Alfridi -LRB- born February 22 , 1968 in Tregnago , Veneto -RRB- is a former Italian race walker .. Tregnago. Tregnago. Veneto. Veneto. Italian. Italy. race walker. race walking
not_related.