TASK DEFINITION: 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.
PROBLEM: 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 .

SOLUTION: however

PROBLEM: Sentence 1:The Opel vehicles sold in the 1960s and 1970s are exceptions to this rule because they were sold through the Buick distribution channel , while retaining the Opel brand name . Sentence 2:Thus , they are captive imports .

SOLUTION: thus

PROBLEM: Sentence 1:In February 2006 , Barnkanalen got new graphics and Joppe and Nella were removed . Sentence 2:Instead , a new show called Bobster was shown between the programmes in the afternoon .

SOLUTION:
instead