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.

Example Input: Sentence 1:A mob boss plots to kidnap Leo 's son and ex-wife , who are headed to New York . Sentence 2:Meanwhile , Cat has to help Gregg prove himself innocent of a brutal crime .
Example Output: meanwhile

Example Input: Sentence 1:Before the war the Silesian German population amounted to more than four million inhabitants . Sentence 2:However many died or fled before the oncoming front .
Example Output: however

Example Input: Sentence 1:We have reached a contradiction . Sentence 2:Therefore , the assumption that L ( \ displaystyle L ) is regular must be incorrect .
Example Output:
therefore