With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Oscar Isaac is a character in Star Wars sequel trilogy.
text_B: A referendum on the Federation of Arab Republics was held in Libya on 1 September 1971 , alongside simultaneous referendums in Egypt and Syria .. Federation of Arab Republics. Federation of Arab Republics. Libya. Libya. Egypt. Egyptian Federation of Arab Republics referendum, 1971. Syria. Syrian Federation of Arab Republics referendum, 1971. It was approved by 98.6 % of voters , with a turnout of 94.6 % .
not_related.