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: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 ) .
however

Sentence 1:Billy Corgan of The Smashing Pumpkins was supposed to fight alongside Dave Grohl . Sentence 2:However , he was killed before the fight began , similar to the death of Susan Lucci .
however

Sentence 1:The EPA also needs to determine the reasonably ascertainable economic consequences of the rule , after considering the effect to the national economy and businesses . Sentence 2:However , the section 6 is taken into consideration to amend in the 2013 reform .

however