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.

Example Input: Sentence 1:Contrary to quartz , GaPO is not found in nature . Sentence 2:Therefore , a hydrothermal process must be used to synthesize the crystal .
Example Output: therefore

Example Input: Sentence 1:A particular concern , Krasniqi says , is the current law on religious freedom . Sentence 2:Similarly , the KPEC plans to challenge the education ministry 's financing of an Islamic madrasa in the capital .
Example Output: similarly

Example Input: 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 .
Example Output:
therefore