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:She feels sad on having put them through such troubles and begs them to return before she leaves the country . Sentence 2:They however refuse , saying that they stay has actually made them better than they were in the city .
[A]: however


[Q]: Sentence 1:Rather than full convertibility , it provided a fixed price for sales between central banks . Sentence 2:However , there was still an open gold market .
[A]: however


[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