With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: In the California primaries, Robert F. Kennedy beat Senator Eugene McCarthy.
text_B: Darley Racing is a thoroughbred horse racing operations controlled by Sheikh Mohammed bin Rashid Al Maktoum , ruler of Dubai and vice-president of the United Arab Emirates .. thoroughbred. thoroughbred. horse racing. horse racing. Mohammed bin Rashid Al Maktoum. Mohammed bin Rashid Al Maktoum. Dubai. Dubai. United Arab Emirates. United Arab Emirates. It was launched in 1981 .. Horses owned include Singspiel , Dubawi , and Cape Cross .. Darley Stud is the operation 's breeding arm with stud farms in Ireland , USA , and Australia .. Darley Stud. Darley Stud. breeding. horse breeding
not_related.