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 first production aircraft , 80 - 10785 was ready for its first flight on 20 April 1982 . Sentence 2:However , unbeknownst to anyone , the fly - by - wire system had been hooked up incorrectly ( pitch was yaw and vice versa ) .

SOLUTION: however

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:It excludes problems with flow separation at sea level and increases efficiency of the engine in vacuum . Sentence 2:For example , application of nozzle extension for liquid rocket engine NK - 33 improves the value of specific impulse up to 15 - 20 sec for near - space conditions .

SOLUTION:
for example

