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.
Input: Sentence 1:At the time , there was great concern that many of the flooded abandoned mine tunnels -- running underneath Swoyersville -- would cave - in . Sentence 2:However , the cave - ins never occurred .
Output:
however