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 Input:
Sentence 1:Extraction of rather small amounts of U-234 from natural uranium would be feasible using isotope separation , similar to that used for regular uranium - enrichment . Sentence 2:However , there is no real demand in chemistry , physics , or engineering for isolating U-234 .

Ex Output:
however


Ex Input:
Sentence 1:In Classical Chinese , pronouns were overtly inflected to mark case . Sentence 2:However , these overt case forms are no longer used ; most of the alternative pronouns are considered archaic in modern Mandarin Chinese .

Ex Output:
however


Ex Input:
Sentence 1:There 's lots of innuendo but no proof . Sentence 2:However , it is made plausible because of the fact that I am an Italian - American .

Ex Output:

however