With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Puerto Rico is an island.
text_B: The 2000 Milton Keynes Council election took place on 4 May 2000 to elect members of Milton Keynes Unitary Council in Buckinghamshire , England .. Milton Keynes. Milton Keynes ( borough ). Unitary. Unitary authority. Buckinghamshire. Buckinghamshire. England. England. One third of the council was up for election and the council stayed under no overall control .. no overall control. no overall control. After the election , the composition of the council was. Labour 22. Labour. Labour Party ( UK ). Liberal Democrat 20. Liberal Democrat. Liberal Democrats ( UK ). Conservative 8. Conservative. Conservative Party ( UK ). Independent 1. Independent. Independent ( politician )
not_related.