With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Charles Mackay was born on March 27, 1814.
text_B: Theon of Samos was an ancient Greek painter during the era of Alexander the Great , is mentioned by Quintilian as a good artist of the second rank .. ancient Greek. Ancient Greece. painter. Painting. Alexander the Great. Alexander the Great. Quintilian. Quintilian. If we may trust the somewhat flimsy stories told about him , his forte consisted in a lifelike , or perhaps , as Brunn -LRB- Kunstlergeschichte , ii .253 -RRB- puts it , a theatrical representation of action .. His figures were said to start out of the picture .. He chose such congenial subjects as the madness of Orestes , and a soldier rushing to battle .. Orestes. Orestes. Another painter , Theorus , is mentioned , whom Brunn regards as identical with Theon .. painter. Painting
not_related.