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: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 .
[A]: however


[Q]: Sentence 1:By measuring the thickness of individual rings , it has been assumed ( at least in some species ) to estimate fish growth because fish growth is directly proportional to otolith growth . Sentence 2:However , some studies disprove a direct link between body growth and otolith growth .
[A]: however


[Q]: Sentence 1:Many members of the monk and kuge classes in Japan would visit the area and use the paper , bringing it back to their homelands , increasing the distribution of the paper . Sentence 2:Eventually , merchants began to sell the paper throughout Japan , too .
[A]:
eventually