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.

[Q]: Sentence 1:According to doctors , he suffered with mild stroke and he is out of danger . Sentence 2:However , the doctors suggested to him to remain in the hospital for some days .
[A]: however


[Q]: Sentence 1:The Fe ( II ) - O-O - BH4 bridge is subsequently formed . Sentence 2:On the other hand , formation of this bridge has been modeled assuming that BH4 is located in iron 's first coordination shell and that the iron is not coordinated to any water molecules .
[A]: on the other hand


[Q]: Sentence 1:Frank is asked to join a secret order within M.I. 9 called the League of Mata Hari . Sentence 2:However , the curious team uncovers a criminal conspiracy that runs throughout M.I. 9 .
[A]:
however