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.
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Question: 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 .

Answer: however


Question: Sentence 1:He was born again . Sentence 2:But when he was re-educated into West German democracy , the Nazi remained a Nazi .

Answer: but


Question: Sentence 1:Gustav Holst is commissioned by the New York Symphony Orchestra to write a symphony , but does not do so . Sentence 2:Instead , he starts work on the tone poem Egdon Heath , which is premiered by the NYSO in the following year .

Answer:
instead