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:However , these amounts are not extractable without mining of the host materials ( see Production and availability ) . Sentence 2:Thus , the availability of indium is fundamentally determined by the rate at which these ores are extracted , and not their absolute amount .

A: thus
****
Q: Sentence 1:The shapes and unusual spider appearance of these features have stimulated a variety of scientific hypotheses about their origin , ranging from differences in frosting reflectance , to explanations involving biological processes . Sentence 2:However , all current geophysical models assume some sort of geyser - like activity .

A: however
****
Q: Sentence 1:Raye has had successful years as a run - based offensive coordinator , namely with the 1984 Los Angeles Rams , when Eric Dickerson rushed for a league - record 2,105 yards . Sentence 2:However , his recent success has been questionable .

A:
however
****