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:All of these characteristics run contrary to the idea that fitness is defined by individual organisms attempting to selfishly reproduce . Sentence 2:However , it soon became clear that group selection was losing the battle .

SOLUTION: however

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:Her ghost began lurking in the washrooms and corridors of the Heika 's palace , haunting mirrors . Sentence 2:Eventually , she managed to take on a physical form and escaped the Homelands with a group of yokai who had been banished from the court .

SOLUTION:
eventually