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:Two days later , it was announced he and Borussia Dortmund would not be extending their contract after it expired after 30 July 2016 . Sentence 2:However , on 1 July 2015 , he signed a contract extension to keep him at the club until 2017 .

Answer: however


Question: Sentence 1:These events , combined with the effects of the Civil War and Reconstruction took a heavy toll on the parish . Sentence 2:However , the people proved resilient , and in short order became prosperous again .

Answer: however


Question: Sentence 1:However , electricity network traditionally is not designed to deal with the 2 - way energy transfer . Sentence 2:Therefore , some technical issues may occur .

Answer:
therefore