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:The specification only allows filenames to be up to 64 Unicode characters in length . Sentence 2:However , the documentation for mkisofs states filenames up to 103 characters in length do not appear to cause problems .
Example Output: however

Example Input: Sentence 1:Billy Corgan of The Smashing Pumpkins was supposed to fight alongside Dave Grohl . Sentence 2:However , he was killed before the fight began , similar to the death of Susan Lucci .
Example Output: however

Example Input: Sentence 1:Thus , plants found in these environments have the adaptive ability to grow , despite these conditions . Sentence 2:Furthermore , such an extreme environment facilitates the high rate of endemism found , as few species are able to dominate a serpentine plant community .
Example Output:
furthermore