In this task, you are given two sentences in the English language (Sentence 1 and Sentence 2). Your task is to identify the connecting word between the two sentences.
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Question: Sentence 1:This organization held its first meeting in Berlin . Sentence 2:However , it was forced underground by the British , who refused to let these German allies operate .

Answer: however

Question: Sentence 1:The poem is generally attributed to Anne Boleyn , and is assumed to have been composed whilst she was imprisoned in the Tower of London . Sentence 2:However , the evidence for her authorship is n't entirely conclusive .

Answer: however

Question: Sentence 1:He also reopened negotiations with Charlemagne and recognized the rival emperor as basileus ( emperor ) ( but not as Emperor of the Romans ) . Sentence 2:However the war with Krum continued and would bring the downfall of the imperial couple .

Answer:
however