instruction:
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.
question:
Sentence 1:This design allows the vertical misalignment to be about 20 cm with a 50 % power efficiency . Sentence 2:However , the U shaped cores also require return cables which bumps up the cost of production .
answer:
however

question:
Sentence 1:The second pre-production train was also tested on the Victoria line during engineering hours , and was expected to begin trial running in full passenger service in July 2008 . Sentence 2:However , this date slipped twice , first to January 2009 and then to July 2009 .
answer:
however

question:
Sentence 1:The technique only works well for higher charge state peptide or polymer ions ( z > 2 ) . Sentence 2:However , relative to collision - induced dissociation ( CID ) , ETD is advantageous for the fragmentation of longer peptides or even entire proteins .
answer:
however