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.

[EX Q]: Sentence 1:Jeremy Enigk eventually took over on lead vocals from Dan Hoerner . Sentence 2:However , Dan continued to supply back up vocals , as well as performing as the band 's lead guitarist and backing vocalist .
[EX A]: however

[EX Q]: Sentence 1:AFIS is not internationally regulated like Air traffic control is by ICAO . Sentence 2:However Eurocontrol have issued a recommendation called Eurocontrol manual for AFIS .
[EX A]: however

[EX Q]: Sentence 1:BG constructs an excellent paper bird for a school project . Sentence 2:But when she tries to share her expertise with her best friends , it leads to misunderstandings and hard feelings .
[EX A]:
but