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.

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 .
however

Sentence 1:In the above , function ( ) can be called by different threads without any problem . Sentence 2:But , if the function is used in a reentrant interrupt handler and a second interrupt arises inside the function , the second routine will hang forever .
but

Sentence 1:Uncle Arthur convinces Darrin that a lucky charm will protect him from witchcraft and all types of harm . Sentence 2:However , the charm is a fake and Darrin starts taking chances that may prove disastrous .
however