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:Antonio McKee was originally scheduled to defend his lightweight title against Drew Fickett . Sentence 2:However , McKee was forced to withdraw from the bout and was replaced by UFC veteran Matt Veach .

SOLUTION: however

PROBLEM: Sentence 1:PrP has been detected in the blood of sick animals by means of PMCA technology . Sentence 2:However , repeated cycling over several days , which is necessary for PMCA of blood material , has been reported to result in decreased specificity ( false positives ) .

SOLUTION: however

PROBLEM: Sentence 1:It was even able to build a new fine arts center , which opened in November of that year . Sentence 2:However , Kleinhenz 's resignation in 1973 triggered a period of instability and enrollment declined again .

SOLUTION:
however